diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7ee893e..91a4a52 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
       - name: Restore and save Nix store
         uses: nix-community/cache-nix-action@v7
         with:
-          primary-key: nix-v2-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('flake.nix', 'flake.lock', 'Cargo.lock', 'Cargo.toml') }}-${{ hashFiles('src/**', 'tests/**', 'scripts/**', 'install.sh', 'README.md', 'LICENSE') }}
+          primary-key: nix-v2-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('flake.nix', 'flake.lock', 'Cargo.lock', 'Cargo.toml') }}-${{ hashFiles('crates/**', 'scripts/**', 'install.sh', 'README.md', 'LICENSE') }}
           restore-prefixes-first-match: |
             nix-v2-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('flake.nix', 'flake.lock', 'Cargo.lock', 'Cargo.toml') }}-
             nix-v2-${{ runner.os }}-${{ runner.arch }}-
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 887cfcb..f18dc43 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,6 +13,7 @@ on:
     paths:
       - ".github/workflows/release.yml"
       - "Cargo.toml"
+      - "crates/*/Cargo.toml"
       - "Cargo.lock"
       - "package.json"
       - "scripts/install.js"
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index dfb9713..f1c407f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -3,9 +3,9 @@ repos:
     hooks:
       # Golden files pin exact CLI output, including trailing spaces.
       - id: trailing-whitespace
-        exclude: ^tests/golden/.*\.golden$
+        exclude: ^crates/idx-cli/tests/golden/.*\.golden$
       - id: end-of-file-fixer
-        exclude: ^tests/golden/.*\.golden$
+        exclude: ^crates/idx-cli/tests/golden/.*\.golden$
       - id: check-merge-conflict
 
   - repo: local
diff --git a/AGENTS.md b/AGENTS.md
index 70b7779..122a90a 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -5,16 +5,19 @@
 
 ## Navigation
 ```text
-src/
-├── main.rs, config.rs, cache.rs, error.rs, curl_impersonate.rs
-├── cli/        clap commands: stocks, ownership, config, cache
-├── api/        providers: msn/ (default), yahoo/ (history/OHLCV)
-├── analysis/   technical, fundamental, signals
-├── ownership/  xlsx + pdf parsers, archive (ZIP/TXT), remote discovery,
-│               snapshot sync, db (SQLite/FTS5), entities, search, graph
-└── output/     table.rs, json.rs
-tests/          cli.rs (behavior), golden.rs + golden/ (output parity), fixtures/
-scripts/        smoke, installer, and ownership snapshot publisher
+crates/idx-core/            library: all data access and analysis
+├── src/api/                providers: msn/ (default), yahoo/ (history/OHLCV)
+├── src/analysis/           technical, fundamental, signals
+├── src/ownership/          xlsx + pdf parsers, archive (ZIP/TXT), remote discovery,
+│                           snapshot sync, db (SQLite/FTS5), entities, search, graph
+├── src/{cache,config,error,curl_impersonate}.rs, lib.rs (runtime)
+└── tests/fixtures/         shared fixtures (also read by the mock provider)
+crates/idx-cli/             binary `idx`
+├── src/cli/                clap commands: stocks, ownership, config, cache
+├── src/config.rs           IdxConfig: output format and color resolution
+├── src/output/             table.rs, json.rs, style.rs
+└── tests/                  cli.rs (behavior), golden.rs + golden/ (output parity)
+scripts/                    smoke, installer, and ownership snapshot publisher
 ```
 
 Docs:
diff --git a/Cargo.lock b/Cargo.lock
index d9b9acf..f8f727a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -718,10 +718,26 @@ dependencies = [
  "clap",
  "clap_complete",
  "comfy-table",
- "directories",
- "fastrand",
+ "idx-core",
  "owo-colors",
  "predicates",
+ "rusqlite",
+ "serde",
+ "serde_json",
+ "sha2",
+ "toml",
+ "ureq",
+ "zip",
+]
+
+[[package]]
+name = "idx-core"
+version = "0.2.4"
+dependencies = [
+ "chrono",
+ "clap",
+ "directories",
+ "fastrand",
  "quick-xml",
  "rusqlite",
  "serde",
diff --git a/Cargo.toml b/Cargo.toml
index 0cac163..68c9bd6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,50 +1,23 @@
-[package]
-name = "idx-cli"
+[workspace]
+resolver = "3"
+members = ["crates/idx-core", "crates/idx-cli"]
+
+[workspace.package]
 version = "0.2.4"
 edition = "2024"
 rust-version = "1.85"
-description = "CLI tool for Indonesian stock market (IDX) analysis"
 license = "MIT"
 repository = "https://github.com/0xrsydn/idx-cli"
 homepage = "https://github.com/0xrsydn/idx-cli"
-keywords = ["idx", "stocks", "indonesia", "cli", "finance"]
-categories = ["command-line-utilities", "finance"]
-include = [
-  "/Cargo.toml",
-  "/Cargo.lock",
-  "/LICENSE",
-  "/README.md",
-  "/src/**",
-  "/tests/cli.rs",
-  "/tests/fixtures/**",
-]
 
-[[bin]]
-name = "idx"
-path = "src/main.rs"
-
-[features]
-default = ["ownership"]
-ownership = ["dep:rusqlite", "dep:quick-xml", "dep:sha2", "dep:zip"]
-
-[dependencies]
+[workspace.dependencies]
+idx-core = { path = "crates/idx-core", version = "=0.2.4" }
 clap = { version = "4", features = ["derive"] }
-clap_complete = "4"
-ureq = { version = "3", features = ["json", "cookies"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = { version = "1", features = ["raw_value"] }
-comfy-table = "7"
-owo-colors = "4"
 toml = "0.8"
-directories = "5"
 chrono = { version = "0.4", features = ["serde"] }
-thiserror = "2"
-fastrand = "2"
-rusqlite = { version = "0.32", features = ["bundled-full"], optional = true }
-quick-xml = { version = "0.37", optional = true }
-sha2 = { version = "0.10", optional = true }
-zip = { version = "2", default-features = false, features = ["deflate"], optional = true }
-
-[dev-dependencies]
-assert_cmd = "2"
-predicates = "3"
+ureq = { version = "3", features = ["json", "cookies"] }
+rusqlite = { version = "0.32", features = ["bundled-full"] }
+sha2 = "0.10"
+zip = { version = "2", default-features = false, features = ["deflate"] }
diff --git a/crates/idx-cli/Cargo.toml b/crates/idx-cli/Cargo.toml
new file mode 100644
index 0000000..53fa329
--- /dev/null
+++ b/crates/idx-cli/Cargo.toml
@@ -0,0 +1,43 @@
+[package]
+name = "idx-cli"
+description = "CLI tool for Indonesian stock market (IDX) analysis"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+repository.workspace = true
+homepage.workspace = true
+readme = "../../README.md"
+keywords = ["idx", "stocks", "indonesia", "cli", "finance"]
+categories = ["command-line-utilities", "finance"]
+include = ["/Cargo.toml", "/LICENSE", "/src/**"]
+
+[[bin]]
+name = "idx"
+path = "src/main.rs"
+
+[features]
+default = ["ownership"]
+# rusqlite/sha2/ureq back ownership import code that phase 3 moves into idx-core.
+ownership = ["idx-core/ownership", "dep:rusqlite", "dep:sha2", "dep:ureq"]
+
+[dependencies]
+idx-core = { workspace = true, features = ["clap"] }
+clap.workspace = true
+clap_complete = "4"
+serde.workspace = true
+serde_json.workspace = true
+comfy-table = "7"
+owo-colors = "4"
+toml.workspace = true
+chrono.workspace = true
+rusqlite = { workspace = true, optional = true }
+sha2 = { workspace = true, optional = true }
+ureq = { workspace = true, optional = true }
+
+[dev-dependencies]
+assert_cmd = "2"
+predicates = "3"
+rusqlite.workspace = true
+sha2.workspace = true
+zip.workspace = true
diff --git a/crates/idx-cli/LICENSE b/crates/idx-cli/LICENSE
new file mode 120000
index 0000000..30cff74
--- /dev/null
+++ b/crates/idx-cli/LICENSE
@@ -0,0 +1 @@
+../../LICENSE
\ No newline at end of file
diff --git a/src/cli/cache.rs b/crates/idx-cli/src/cli/cache.rs
similarity index 96%
rename from src/cli/cache.rs
rename to crates/idx-cli/src/cli/cache.rs
index 8b190a7..f542d10 100644
--- a/src/cli/cache.rs
+++ b/crates/idx-cli/src/cli/cache.rs
@@ -1,9 +1,9 @@
 use clap::{Args, Subcommand};
 
-use crate::cache::Cache;
-use crate::error::IdxError;
 use crate::output::{OutputFormat, json};
-use crate::runtime;
+use idx_core::cache::Cache;
+use idx_core::error::IdxError;
+use idx_core::runtime;
 
 #[derive(Debug, Args)]
 #[command(about = "Manage local cache")]
diff --git a/src/cli/config.rs b/crates/idx-cli/src/cli/config.rs
similarity index 97%
rename from src/cli/config.rs
rename to crates/idx-cli/src/cli/config.rs
index 17f7cc7..cd77da2 100644
--- a/src/cli/config.rs
+++ b/crates/idx-cli/src/cli/config.rs
@@ -1,7 +1,7 @@
 use clap::{Args, Subcommand};
 
 use crate::config::{config_path, ensure_default_config, get_config_value, set_config_value};
-use crate::error::IdxError;
+use idx_core::error::IdxError;
 
 #[derive(Debug, Args)]
 #[command(about = "Manage configuration")]
diff --git a/src/cli/mod.rs b/crates/idx-cli/src/cli/mod.rs
similarity index 100%
rename from src/cli/mod.rs
rename to crates/idx-cli/src/cli/mod.rs
diff --git a/src/cli/ownership.rs b/crates/idx-cli/src/cli/ownership.rs
similarity index 97%
rename from src/cli/ownership.rs
rename to crates/idx-cli/src/cli/ownership.rs
index eeadaea..f5d33b5 100644
--- a/src/cli/ownership.rs
+++ b/crates/idx-cli/src/cli/ownership.rs
@@ -10,13 +10,13 @@ use serde::Serialize;
 use sha2::{Digest, Sha256};
 
 use crate::config::IdxConfig;
-use crate::error::IdxError;
 use crate::output::json;
 use crate::output::table::format_idr;
-use crate::ownership::types::{
+use idx_core::error::IdxError;
+use idx_core::ownership::types::{
     ChangeType, FlowSignal, HolderRow, KseiHolding, OwnershipRelease, OwnershipSource,
 };
-use crate::ownership::{archive, db, entities, graph, parser, remote, search, snapshot, xlsx};
+use idx_core::ownership::{archive, db, entities, graph, parser, remote, search, snapshot, xlsx};
 
 #[derive(Debug, Args)]
 #[command(
@@ -215,7 +215,7 @@ pub fn handle(cmd: &OwnershipCommand, config: &IdxConfig) -> Result<(), IdxError
 
 fn handle_sync(args: &SyncArgs, config: &IdxConfig) -> Result<(), IdxError> {
     let manifest_source = snapshot::resolve_manifest_source(args.manifest.as_deref())?;
-    let db_path = db::db_path(config)?;
+    let db_path = db::db_path()?;
     let result = snapshot::sync_snapshot(&manifest_source, &db_path, args.force)?;
 
     if config.output.is_json() {
@@ -301,7 +301,7 @@ fn handle_discover(args: &DiscoverArgs, config: &IdxConfig) -> Result<(), IdxErr
 }
 
 fn handle_ticker(args: &TickerArgs, config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
     let symbol = args.symbol.trim().to_uppercase();
     let source = args.source.trim().to_lowercase();
     if !["all", "ksei", "bing"].contains(&source.as_str()) {
@@ -368,8 +368,8 @@ fn handle_ticker(args: &TickerArgs, config: &IdxConfig) -> Result<(), IdxError>
             Cell::new(&h.name),
             Cell::new(h.investor_type.clone().unwrap_or_else(|| "-".to_string())),
             Cell::new(match h.locality {
-                Some(crate::ownership::types::Locality::Local) => "L",
-                Some(crate::ownership::types::Locality::Foreign) => "F",
+                Some(idx_core::ownership::types::Locality::Local) => "L",
+                Some(idx_core::ownership::types::Locality::Foreign) => "F",
                 None => "-",
             }),
             Cell::new(format_idr(h.shares)),
@@ -393,7 +393,7 @@ fn handle_ticker(args: &TickerArgs, config: &IdxConfig) -> Result<(), IdxError>
 }
 
 fn handle_entity(args: &EntityArgs, config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
     let q = format!("%{}%", args.name.trim());
 
     let entity = conn
@@ -436,7 +436,7 @@ fn handle_entity(args: &EntityArgs, config: &IdxConfig) -> Result<(), IdxError>
 }
 
 fn handle_search(args: &SearchArgs, config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
     let entities = search::fts_search(&conn, &args.query, args.limit)?;
 
     if config.output.is_json() {
@@ -471,7 +471,7 @@ fn handle_search(args: &SearchArgs, config: &IdxConfig) -> Result<(), IdxError>
 }
 
 fn handle_cross_holders(args: &CrossHolderArgs, config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
     let rows = db::query_cross_holders(&conn, args.min_tickers, args.top)?;
 
     if config.output.is_json() {
@@ -498,7 +498,7 @@ fn handle_cross_holders(args: &CrossHolderArgs, config: &IdxConfig) -> Result<()
 }
 
 fn handle_concentration(args: &ConcentrationArgs, config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
     let by = args.by.trim().to_lowercase();
     if !["top1", "top3", "hhi"].contains(&by.as_str()) {
         return Err(IdxError::ParseError(
@@ -543,7 +543,7 @@ fn handle_concentration(args: &ConcentrationArgs, config: &IdxConfig) -> Result<
 }
 
 fn handle_flow(args: &FlowArgs, config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
     let symbol = args.symbol.trim().to_uppercase();
     let ticker_id = db::get_ticker_id(&conn, &symbol)?
         .ok_or_else(|| IdxError::SymbolNotFound(symbol.clone()))?;
@@ -551,7 +551,9 @@ fn handle_flow(args: &FlowArgs, config: &IdxConfig) -> Result<(), IdxError> {
     let flow = db::query_bing_flow(&conn, ticker_id)?;
     let Some(flow) = flow else {
         if config.output.is_json() {
-            return json::print_json(&Option::<crate::ownership::types::InstitutionalFlow>::None);
+            return json::print_json(
+                &Option::<idx_core::ownership::types::InstitutionalFlow>::None,
+            );
         }
         println!("No institutional flow data available for {symbol}.");
         return Ok(());
@@ -595,14 +597,14 @@ fn print_flow_section(title: &str, rows: &[HolderRow]) {
 }
 
 fn handle_graph(args: &GraphArgs, config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
     let (nodes, edges) = graph::query_ownership_graph(&conn, &args.root, args.depth)?;
 
     if config.output.is_json() {
         #[derive(Serialize)]
         struct GraphOutput<'a> {
-            nodes: &'a [crate::ownership::types::GraphNode],
-            edges: &'a [crate::ownership::types::GraphEdge],
+            nodes: &'a [idx_core::ownership::types::GraphNode],
+            edges: &'a [idx_core::ownership::types::GraphEdge],
         }
         return json::print_json(&GraphOutput {
             nodes: &nodes,
@@ -626,7 +628,7 @@ fn handle_graph(args: &GraphArgs, config: &IdxConfig) -> Result<(), IdxError> {
 }
 
 fn handle_changes(args: &ChangesArgs, config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
     let changes = db::query_changes(&conn, &args.from, &args.to)?;
 
     if config.output.is_json() {
@@ -672,7 +674,7 @@ fn handle_changes(args: &ChangesArgs, config: &IdxConfig) -> Result<(), IdxError
 }
 
 fn handle_resolve(args: &ResolveArgs, config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
 
     match &args.command {
         ResolveCommand::Unresolved { limit } => {
@@ -799,7 +801,7 @@ fn handle_import(args: &ImportArgs, config: &IdxConfig) -> Result<(), IdxError>
         return Ok(());
     };
 
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
 
     let sha256 = sha256_file(&import_input.import_path)?;
     if !args.force && db::release_exists(&conn, &sha256)? {
@@ -911,7 +913,7 @@ fn handle_import(args: &ImportArgs, config: &IdxConfig) -> Result<(), IdxError>
 }
 
 fn handle_releases(config: &IdxConfig) -> Result<(), IdxError> {
-    let conn = db::open_db(config)?;
+    let conn = db::open_db()?;
     let releases = db::query_releases(&conn)?;
 
     if config.output.is_json() {
@@ -1042,7 +1044,7 @@ fn cache_download_path(url: &str, format: ImportInputFormat) -> Result<PathBuf,
         ImportInputFormat::Xlsx => ".xlsx",
         _ => ".pdf",
     };
-    let raw_dir = crate::cache::cache_dir()?.join("ownership").join("raw");
+    let raw_dir = idx_core::cache::cache_dir()?.join("ownership").join("raw");
     fs::create_dir_all(&raw_dir).map_err(|e| IdxError::Io(e.to_string()))?;
 
     let mut file_name = url
diff --git a/src/cli/stocks.rs b/crates/idx-cli/src/cli/stocks.rs
similarity index 95%
rename from src/cli/stocks.rs
rename to crates/idx-cli/src/cli/stocks.rs
index 430c1ce..8aaae85 100644
--- a/src/cli/stocks.rs
+++ b/crates/idx-cli/src/cli/stocks.rs
@@ -4,27 +4,27 @@ use std::io::Read;
 use clap::{Args, Subcommand, ValueEnum};
 use serde::{Serialize, de::DeserializeOwned};
 
-use crate::analysis::fundamental::{
-    FundamentalReport, GrowthReport, RiskReport, ValuationReport, analyze_fundamental,
-    analyze_growth, analyze_risk, analyze_valuation,
-};
-use crate::analysis::signals::{self, Signal, TechnicalSignal};
-use crate::analysis::technical;
-use crate::api::types::{
-    CompanyProfile, EarningsReport, FinancialStatements, Fundamentals, InsightData, Interval,
-    NewsItem, Ohlc, Period, Quote, SentimentData,
-};
-use crate::api::{MarketDataProvider, SelectedProvider, history_provider};
-use crate::cache::Cache;
 use crate::config::{HistoryProviderKind, IdxConfig, ProviderKind};
-use crate::error::IdxError;
 use crate::output::{
     MacdSnapshot, TechnicalReport, VolumeSnapshot, render_compare, render_earnings,
     render_financials, render_fundamental, render_growth, render_history, render_insights,
     render_news, render_profile, render_quotes, render_risk, render_screener, render_sentiment,
     render_technical, render_valuation,
 };
-use crate::runtime;
+use idx_core::analysis::fundamental::{
+    FundamentalReport, GrowthReport, RiskReport, ValuationReport, analyze_fundamental,
+    analyze_growth, analyze_risk, analyze_valuation,
+};
+use idx_core::analysis::signals::{self, Signal, TechnicalSignal};
+use idx_core::analysis::technical;
+use idx_core::api::types::{
+    CompanyProfile, EarningsReport, FinancialStatements, Fundamentals, InsightData, Interval,
+    NewsItem, Ohlc, Period, Quote, SentimentData,
+};
+use idx_core::api::{MarketDataProvider, SelectedProvider, history_provider};
+use idx_core::cache::Cache;
+use idx_core::error::IdxError;
+use idx_core::runtime;
 
 struct FundamentalCacheSpec {
     bucket: String,
@@ -287,7 +287,7 @@ pub fn handle(
             let quote_bucket = cache_bucket(provider.kind(), "quote");
             let mut quotes = Vec::new();
             for sym in expand_symbols(symbols)? {
-                let resolved = crate::api::resolve_symbol(&sym, &config.exchange)?;
+                let resolved = idx_core::api::resolve_symbol(&sym, &config.exchange)?;
                 if !no_cache && let Some(q) = cache.get(&quote_bucket, &resolved)? {
                     quotes.push(q);
                     continue;
@@ -343,10 +343,10 @@ pub fn handle(
                 ));
             }
             let history_bucket = format!("{}-history", history_source.as_str());
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let key = format!("{}-{}", period.as_str(), interval.as_str());
             if !no_cache
-                && let Some(history) = cache.get::<Vec<crate::api::types::Ohlc>>(
+                && let Some(history) = cache.get::<Vec<idx_core::api::types::Ohlc>>(
                     &history_bucket,
                     &format!("{resolved}-{key}"),
                 )?
@@ -355,7 +355,7 @@ pub fn handle(
             }
             if offline {
                 let stale = cache
-                    .get_offline::<Vec<crate::api::types::Ohlc>>(
+                    .get_offline::<Vec<idx_core::api::types::Ohlc>>(
                         &history_bucket,
                         &format!("{resolved}-{key}"),
                     )?
@@ -379,7 +379,7 @@ pub fn handle(
                 }
                 Err(err) => {
                     if !no_cache
-                        && let Some(stale) = cache.get_stale::<Vec<crate::api::types::Ohlc>>(
+                        && let Some(stale) = cache.get_stale::<Vec<idx_core::api::types::Ohlc>>(
                             &history_bucket,
                             &format!("{resolved}-{key}"),
                         )?
@@ -411,7 +411,7 @@ pub fn handle(
                 ));
             }
             let technical_bucket = format!("{}-technical", history_source.as_str());
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             if !no_cache
                 && let Some(report) = cache.get::<TechnicalReport>(&technical_bucket, &resolved)?
             {
@@ -447,7 +447,7 @@ pub fn handle(
             }
         }
         StocksSubcommand::Growth { symbol } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let report: GrowthReport = fetch_fundamental_analysis_report(
                 &cache,
                 provider.market(),
@@ -463,7 +463,7 @@ pub fn handle(
             render_growth(&resolved, &report, &config.output, config.no_color)
         }
         StocksSubcommand::Valuation { symbol } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let report: ValuationReport = fetch_fundamental_analysis_report(
                 &cache,
                 provider.market(),
@@ -479,7 +479,7 @@ pub fn handle(
             render_valuation(&resolved, &report, &config.output, config.no_color)
         }
         StocksSubcommand::Risk { symbol } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let report: RiskReport = fetch_fundamental_analysis_report(
                 &cache,
                 provider.market(),
@@ -495,7 +495,7 @@ pub fn handle(
             render_risk(&resolved, &report, &config.output, config.no_color)
         }
         StocksSubcommand::Fundamental { symbol } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let report: FundamentalReport = fetch_fundamental_analysis_report(
                 &cache,
                 provider.market(),
@@ -511,7 +511,7 @@ pub fn handle(
             render_fundamental(&report, &config.output, config.no_color)
         }
         StocksSubcommand::Profile { symbol } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let bucket = cache_bucket(provider.kind(), "profile-v2");
             let profile_provider = provider.profile_provider(&resolved)?;
             let profile: CompanyProfile = fetch_with_cache(
@@ -529,7 +529,7 @@ pub fn handle(
             render_profile(&profile, &config.output)
         }
         StocksSubcommand::Financials { symbol, filters } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let bucket = cache_bucket(provider.kind(), "financials");
             let financials_provider = provider.financials_provider(&resolved)?;
             let mut financials: FinancialStatements = fetch_with_cache(
@@ -553,7 +553,7 @@ pub fn handle(
             render_financials(&filtered, &config.output)
         }
         StocksSubcommand::Earnings { symbol, filters } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let bucket = cache_bucket(provider.kind(), "earnings");
             let earnings_provider = provider.earnings_provider(&resolved)?;
             let mut earnings: EarningsReport = fetch_with_cache(
@@ -575,7 +575,7 @@ pub fn handle(
             render_earnings(&filtered, &config.output)
         }
         StocksSubcommand::Sentiment { symbol } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let bucket = cache_bucket(provider.kind(), "sentiment");
             let sentiment_provider = provider.sentiment_provider(&resolved)?;
             let sentiment: SentimentData = fetch_with_cache(
@@ -593,7 +593,7 @@ pub fn handle(
             render_sentiment(&sentiment, &config.output)
         }
         StocksSubcommand::Insights { symbol } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let bucket = cache_bucket(provider.kind(), "insights-v2");
             let insights_provider = provider.insights_provider(&resolved)?;
             let mut insights: InsightData = fetch_with_cache(
@@ -614,7 +614,7 @@ pub fn handle(
             render_insights(&insights, &config.output)
         }
         StocksSubcommand::News { symbol, limit } => {
-            let resolved = crate::api::resolve_symbol(symbol, &config.exchange)?;
+            let resolved = idx_core::api::resolve_symbol(symbol, &config.exchange)?;
             let bucket = cache_bucket(provider.kind(), "news");
             let key = format!("{resolved}-{limit}");
             let news_provider = provider.news_provider(&resolved)?;
@@ -679,7 +679,7 @@ pub fn handle(
             let mut failures = Vec::new();
 
             for sym in expand_symbols(symbols)? {
-                let resolved = crate::api::resolve_symbol(&sym, &config.exchange)?;
+                let resolved = idx_core::api::resolve_symbol(&sym, &config.exchange)?;
                 match fetch_fundamental_analysis_report(
                     &cache,
                     provider.market(),
@@ -920,7 +920,7 @@ fn filter_financial_statements(
 }
 
 fn filter_earnings_report(report: &EarningsReport, filters: &EarningsFilterArgs) -> EarningsReport {
-    let filter_rows = |rows: &[crate::api::types::EarningsData]| {
+    let filter_rows = |rows: &[idx_core::api::types::EarningsData]| {
         rows.iter()
             .filter(|row| filters.includes_period(&row.period_type))
             .cloned()
@@ -1044,11 +1044,11 @@ mod tests {
         build_technical_report, classify_earnings_period, filter_earnings_report,
         filter_financial_statements,
     };
-    use crate::analysis::signals::Signal;
-    use crate::api::types::{
+    use idx_core::analysis::signals::Signal;
+    use idx_core::api::types::{
         EarningsData, EarningsReport, FinancialStatements, InstrumentInfo, Ohlc, StatementSection,
     };
-    use crate::error::IdxError;
+    use idx_core::error::IdxError;
 
     #[test]
     fn technical_report_uses_latest_values() {
@@ -1080,7 +1080,7 @@ mod tests {
 
     #[test]
     fn sort_screener_top_performers_descending() {
-        use crate::api::types::Quote;
+        use idx_core::api::types::Quote;
 
         let mut quotes = vec![
             Quote {
@@ -1137,7 +1137,7 @@ mod tests {
 
     #[test]
     fn sort_screener_worst_performers_ascending() {
-        use crate::api::types::Quote;
+        use idx_core::api::types::Quote;
 
         let mut quotes = vec![
             Quote {
@@ -1205,8 +1205,8 @@ mod tests {
         assert_eq!(quotes.last().unwrap().symbol, "U");
     }
 
-    fn sample_quote(symbol: &str, change_pct: Option<f64>) -> crate::api::types::Quote {
-        crate::api::types::Quote {
+    fn sample_quote(symbol: &str, change_pct: Option<f64>) -> idx_core::api::types::Quote {
+        idx_core::api::types::Quote {
             symbol: symbol.into(),
             price: 100,
             change: None,
diff --git a/crates/idx-cli/src/config.rs b/crates/idx-cli/src/config.rs
new file mode 100644
index 0000000..c41c1d1
--- /dev/null
+++ b/crates/idx-cli/src/config.rs
@@ -0,0 +1,167 @@
+use std::fs;
+use std::io::IsTerminal;
+
+use serde::Deserialize;
+
+pub use idx_core::config::*;
+
+use crate::cli::Cli;
+use crate::output::{OutputFormat, OutputSetting};
+use idx_core::error::IdxError;
+
+#[derive(Debug, Clone)]
+pub struct IdxConfig {
+    pub provider: ProviderKind,
+    pub history_provider: HistoryProviderKind,
+    pub exchange: String,
+    pub output: OutputFormat,
+    pub no_color: bool,
+    pub quote_ttl: u64,
+    pub fundamental_ttl: u64,
+}
+
+#[derive(Debug, Deserialize, Default)]
+struct FileConfig {
+    general: Option<FileGeneral>,
+    cache: Option<FileCache>,
+}
+
+#[derive(Debug, Deserialize, Default)]
+struct FileGeneral {
+    provider: Option<ProviderKind>,
+    history_provider: Option<HistoryProviderKind>,
+    exchange: Option<String>,
+    output: Option<OutputSetting>,
+    color: Option<bool>,
+}
+
+#[derive(Debug, Deserialize, Default)]
+struct FileCache {
+    quote_ttl: Option<u64>,
+    fundamental_ttl: Option<u64>,
+}
+
+impl Default for IdxConfig {
+    fn default() -> Self {
+        Self {
+            provider: ProviderKind::Msn,
+            history_provider: HistoryProviderKind::Auto,
+            exchange: "JK".to_string(),
+            output: OutputSetting::Auto.resolve(stdout_is_terminal()),
+            no_color: false,
+            quote_ttl: 300,
+            fundamental_ttl: 3600,
+        }
+    }
+}
+
+impl IdxConfig {
+    pub fn load_with_cli(cli: &Cli) -> Result<Self, IdxError> {
+        let mut cfg = Self::load()?;
+
+        if let Ok(provider) = std::env::var("IDX_PROVIDER") {
+            cfg.provider = ProviderKind::parse(&provider)?;
+        }
+        if let Ok(history_provider) = std::env::var("IDX_HISTORY_PROVIDER") {
+            cfg.history_provider = HistoryProviderKind::parse(&history_provider)?;
+        }
+        if let Ok(exchange) = std::env::var("IDX_EXCHANGE") {
+            cfg.exchange = exchange;
+        }
+        if let Ok(output) = std::env::var("IDX_OUTPUT") {
+            let setting = OutputSetting::parse(&output).ok_or_else(|| {
+                IdxError::ConfigError(format!(
+                    "invalid IDX_OUTPUT value: '{output}', expected 'auto', 'table', 'json', or 'jsonl'"
+                ))
+            })?;
+            cfg.output = setting.resolve(stdout_is_terminal());
+        }
+        if let Ok(no_color) = std::env::var("IDX_NO_COLOR") {
+            cfg.no_color = no_color == "1" || no_color.eq_ignore_ascii_case("true");
+        }
+        if let Some(parsed) = parse_env_ttl("IDX_CACHE_QUOTE_TTL")? {
+            cfg.quote_ttl = parsed;
+        }
+        if let Some(parsed) = parse_env_ttl("IDX_CACHE_FUNDAMENTAL_TTL")? {
+            cfg.fundamental_ttl = parsed;
+        }
+
+        if let Some(output) = cli.output {
+            cfg.output = output.resolve(stdout_is_terminal());
+        }
+        cfg.no_color = cfg.no_color || cli.no_color || !stdout_is_terminal();
+
+        Ok(cfg)
+    }
+
+    pub fn load() -> Result<Self, IdxError> {
+        let mut cfg = Self::default();
+        let path = config_path()?;
+        if path.exists() {
+            let raw = fs::read_to_string(&path).map_err(|e| IdxError::Io(e.to_string()))?;
+            let parsed: FileConfig =
+                toml::from_str(&raw).map_err(|e| IdxError::ConfigError(e.to_string()))?;
+            if let Some(general) = parsed.general {
+                if let Some(provider) = general.provider {
+                    cfg.provider = provider;
+                }
+                if let Some(history_provider) = general.history_provider {
+                    cfg.history_provider = history_provider;
+                }
+                if let Some(exchange) = general.exchange {
+                    cfg.exchange = exchange;
+                }
+                if let Some(output) = general.output {
+                    cfg.output = output.resolve(stdout_is_terminal());
+                }
+                if let Some(color) = general.color {
+                    cfg.no_color = !color;
+                }
+            }
+            if let Some(cache) = parsed.cache {
+                if let Some(v) = cache.quote_ttl {
+                    cfg.quote_ttl = v;
+                }
+                if let Some(v) = cache.fundamental_ttl {
+                    cfg.fundamental_ttl = v;
+                }
+            }
+        }
+        Ok(cfg)
+    }
+}
+
+pub fn stdout_is_terminal() -> bool {
+    std::io::stdout().is_terminal()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::IdxConfig;
+
+    #[test]
+    fn default_values_are_sane() {
+        let cfg = IdxConfig::default();
+        assert_eq!(cfg.provider, super::ProviderKind::Msn);
+        assert_eq!(cfg.history_provider, super::HistoryProviderKind::Auto);
+        assert_eq!(cfg.exchange, "JK");
+        assert_eq!(cfg.quote_ttl, 300);
+    }
+}
+
+#[cfg(test)]
+mod output_values_tests {
+    use clap::ValueEnum;
+
+    use crate::output::OutputSetting;
+
+    #[test]
+    fn core_output_values_match_cli_output_setting() {
+        let cli: Vec<String> = OutputSetting::value_variants()
+            .iter()
+            .filter_map(|v| v.to_possible_value())
+            .map(|v| v.get_name().to_string())
+            .collect();
+        assert_eq!(cli, super::OUTPUT_VALUES);
+    }
+}
diff --git a/src/main.rs b/crates/idx-cli/src/main.rs
similarity index 80%
rename from src/main.rs
rename to crates/idx-cli/src/main.rs
index 0d38ea5..4c75dd0 100644
--- a/src/main.rs
+++ b/crates/idx-cli/src/main.rs
@@ -1,50 +1,18 @@
-pub mod analysis;
-mod api;
-mod cache;
 mod cli;
 mod config;
-mod curl_impersonate;
-mod error;
 mod output;
-#[cfg(feature = "ownership")]
-pub mod ownership;
 
-pub mod runtime {
-    use std::fmt::Display;
-    use std::sync::atomic::{AtomicBool, Ordering};
-
-    static QUIET: AtomicBool = AtomicBool::new(false);
-
-    pub fn set_quiet(quiet: bool) {
-        QUIET.store(quiet, Ordering::Relaxed);
-    }
-
-    pub fn is_quiet() -> bool {
-        QUIET.load(Ordering::Relaxed)
-    }
-
-    pub fn info(message: impl Display) {
-        if !is_quiet() {
-            eprintln!("info: {message}");
-        }
-    }
-
-    pub fn warn(message: impl Display) {
-        if !is_quiet() {
-            eprintln!("warning: {message}");
-        }
-    }
-}
+use idx_core::runtime;
 
 use clap::CommandFactory;
 use clap::Parser;
 use clap_complete::{generate, shells};
 
-use crate::api::default_provider;
 use crate::cli::{Cli, Commands};
 use crate::config::IdxConfig;
-use crate::error::IdxError;
 use crate::output::{OutputFormat, OutputSetting, emit_error};
+use idx_core::api::default_provider;
+use idx_core::error::IdxError;
 
 fn main() {
     if let Err(err) = run() {
diff --git a/src/output/json.rs b/crates/idx-cli/src/output/json.rs
similarity index 97%
rename from src/output/json.rs
rename to crates/idx-cli/src/output/json.rs
index 1b8d223..9dd7115 100644
--- a/src/output/json.rs
+++ b/crates/idx-cli/src/output/json.rs
@@ -2,7 +2,7 @@ use std::sync::atomic::{AtomicU8, Ordering};
 
 use serde::Serialize;
 
-use crate::error::IdxError;
+use idx_core::error::IdxError;
 
 const PRETTY: u8 = 0;
 const COMPACT: u8 = 1;
diff --git a/src/output/mod.rs b/crates/idx-cli/src/output/mod.rs
similarity index 97%
rename from src/output/mod.rs
rename to crates/idx-cli/src/output/mod.rs
index 4559a2a..5c43bda 100644
--- a/src/output/mod.rs
+++ b/crates/idx-cli/src/output/mod.rs
@@ -8,13 +8,15 @@ use chrono::NaiveDate;
 use clap::ValueEnum;
 use serde::{Deserialize, Serialize};
 
-use crate::analysis::fundamental::{FundamentalReport, GrowthReport, RiskReport, ValuationReport};
-use crate::analysis::signals::TechnicalSignal;
-use crate::api::types::{
+use idx_core::analysis::fundamental::{
+    FundamentalReport, GrowthReport, RiskReport, ValuationReport,
+};
+use idx_core::analysis::signals::TechnicalSignal;
+use idx_core::api::types::{
     CompanyProfile, EarningsReport, FinancialStatements, InsightData, NewsItem, Ohlc, Quote,
     SentimentData,
 };
-use crate::error::IdxError;
+use idx_core::error::IdxError;
 
 /// Output format requested by the user (flag, `IDX_OUTPUT`, or config file).
 #[derive(Debug, Clone, Copy, ValueEnum, PartialEq, Eq, Serialize, serde::Deserialize, Default)]
diff --git a/src/output/style.rs b/crates/idx-cli/src/output/style.rs
similarity index 100%
rename from src/output/style.rs
rename to crates/idx-cli/src/output/style.rs
diff --git a/src/output/table.rs b/crates/idx-cli/src/output/table.rs
similarity index 98%
rename from src/output/table.rs
rename to crates/idx-cli/src/output/table.rs
index 2f26f94..f17f8d5 100644
--- a/src/output/table.rs
+++ b/crates/idx-cli/src/output/table.rs
@@ -1,14 +1,16 @@
 use crate::output::style::Paint;
 use comfy_table::{Cell, Color, ContentArrangement, Table, presets::UTF8_FULL};
 
-use crate::analysis::fundamental::{FundamentalReport, GrowthReport, RiskReport, ValuationReport};
-use crate::analysis::signals::Signal;
-use crate::api::types::{
+use crate::output::TechnicalReport;
+use idx_core::analysis::fundamental::{
+    FundamentalReport, GrowthReport, RiskReport, ValuationReport,
+};
+use idx_core::analysis::signals::Signal;
+use idx_core::api::types::{
     CompanyProfile, EarningsData, EarningsReport, FinancialStatements, InsightData, NewsItem, Ohlc,
     Quote, SentimentData,
 };
-use crate::error::IdxError;
-use crate::output::TechnicalReport;
+use idx_core::error::IdxError;
 
 pub fn format_idr(value: i64) -> String {
     let sign = if value.is_negative() { "-" } else { "" };
@@ -708,7 +710,7 @@ pub fn print_profile(profile: &CompanyProfile) -> Result<(), IdxError> {
 }
 
 pub fn print_financials(fin: &FinancialStatements) -> Result<(), IdxError> {
-    let print_section = |label: &str, section: &crate::api::types::StatementSection| {
+    let print_section = |label: &str, section: &idx_core::api::types::StatementSection| {
         println!("\n── {label} ({}) ──", format_table_date(&section.end_date));
         let mut t = Table::new();
         let value_header = format!("VALUE ({})", section.currency);
@@ -887,8 +889,8 @@ mod tests {
         format_earnings_period, format_idr, format_signal, format_table_date, format_u64,
         humanize_metric_key, stale_quote_notes,
     };
-    use crate::analysis::signals::Signal;
-    use crate::api::types::Quote;
+    use idx_core::analysis::signals::Signal;
+    use idx_core::api::types::Quote;
 
     fn quote_as_of(symbol: &str, as_of: &str) -> Quote {
         Quote {
diff --git a/tests/cli.rs b/crates/idx-cli/tests/cli.rs
similarity index 97%
rename from tests/cli.rs
rename to crates/idx-cli/tests/cli.rs
index 5e3f34d..9baa2f0 100644
--- a/tests/cli.rs
+++ b/crates/idx-cli/tests/cli.rs
@@ -26,7 +26,7 @@ fn resolve_idx_binary_path() -> PathBuf {
     }
 
     let target_debug = Path::new(env!("CARGO_MANIFEST_DIR"))
-        .join("target")
+        .join("../../target")
         .join("debug")
         .join(format!("idx{}", std::env::consts::EXE_SUFFIX));
     if candidate_is_idx_binary(&target_debug) {
@@ -113,7 +113,8 @@ fn bin_with_root(root: &Path) -> Command {
     fs::create_dir_all(&cache_home).expect("create cache dir");
 
     let mut cmd = bin();
-    cmd.current_dir(env!("CARGO_MANIFEST_DIR"));
+    // The mock provider reads fixtures relative to the working directory.
+    cmd.current_dir(core_dir());
     // Tests run with piped stdout, where the default (auto) format is JSON.
     // Pin table so tests that assert table text keep doing so; `-o` and
     // per-test IDX_OUTPUT still override this.
@@ -128,11 +129,13 @@ fn test_bin(name: &str) -> Command {
     bin_with_root(&root)
 }
 
+/// idx-core crate root, which owns the shared test fixtures.
+fn core_dir() -> PathBuf {
+    Path::new(env!("CARGO_MANIFEST_DIR")).join("../idx-core")
+}
+
 fn fixture_path(name: &str) -> PathBuf {
-    Path::new(env!("CARGO_MANIFEST_DIR"))
-        .join("tests")
-        .join("fixtures")
-        .join(name)
+    core_dir().join("tests").join("fixtures").join(name)
 }
 
 fn run_success_stdout(cmd: &mut Command) -> String {
@@ -375,11 +378,11 @@ fn prepare_snapshot_fixture(root: &Path) -> (PathBuf, PathBuf) {
         &[
             (
                 "release-2026-01-31.pdf",
-                include_str!("fixtures/ksei_above1_stext_excerpt_prev.xml"),
+                include_str!("../../idx-core/tests/fixtures/ksei_above1_stext_excerpt_prev.xml"),
             ),
             (
                 "release-2026-02-27.pdf",
-                include_str!("fixtures/ksei_above1_stext_excerpt.xml"),
+                include_str!("../../idx-core/tests/fixtures/ksei_above1_stext_excerpt.xml"),
             ),
         ],
     );
@@ -1064,7 +1067,7 @@ const UNREACHABLE_DATA_PAGE_URL: &str = "http://127.0.0.1:9/data-kepemilikan-sah
 
 #[test]
 fn ownership_discover_finds_xlsx_on_share_ownership_page() {
-    let page = fs::read_to_string("tests/fixtures/idx_share_ownership_page_excerpt.html")
+    let page = fs::read_to_string(fixture_path("idx_share_ownership_page_excerpt.html"))
         .expect("read share ownership page fixture");
     let page_url = spawn_single_response_server("text/html", page);
 
@@ -1098,7 +1101,7 @@ fn ownership_discover_finds_xlsx_on_share_ownership_page() {
 
 #[test]
 fn ownership_discover_lists_fixture_candidates() {
-    let body = fs::read_to_string("tests/fixtures/idx_announcement_kepemilikan.json")
+    let body = fs::read_to_string(fixture_path("idx_announcement_kepemilikan.json"))
         .expect("read ownership discovery fixture");
     let json_url = spawn_single_response_server("application/json", body);
 
@@ -1332,7 +1335,7 @@ fn ownership_import_url_supported_pdf_succeeds_with_fake_mutool() {
     let db_path = root.join("ownership.db");
     let fake_mutool_dir = install_fake_mutool(
         &root,
-        include_str!("fixtures/ksei_above1_stext_excerpt.xml"),
+        include_str!("../../idx-core/tests/fixtures/ksei_above1_stext_excerpt.xml"),
     );
     let pdf_base = spawn_single_response_server("application/pdf", fake_pdf_bytes());
     let pdf_url = pdf_url(&pdf_base, "supported");
@@ -1369,7 +1372,7 @@ fn ownership_import_url_caches_download_under_xdg_cache_home() {
     let cache_home = root.join("xdg-cache");
     let fake_mutool_dir = install_fake_mutool(
         &root,
-        include_str!("fixtures/ksei_above1_stext_excerpt.xml"),
+        include_str!("../../idx-core/tests/fixtures/ksei_above1_stext_excerpt.xml"),
     );
     let pdf_base = spawn_single_response_server("application/pdf", fake_pdf_bytes());
     let pdf_url = pdf_url(&pdf_base, "cached-raw");
@@ -1408,7 +1411,7 @@ fn ownership_import_url_duplicate_release_is_skipped() {
     let db_path = root.join("ownership.db");
     let fake_mutool_dir = install_fake_mutool(
         &root,
-        include_str!("fixtures/ksei_above1_stext_excerpt.xml"),
+        include_str!("../../idx-core/tests/fixtures/ksei_above1_stext_excerpt.xml"),
     );
     let first_base = spawn_single_response_server("application/pdf", fake_pdf_bytes());
     let second_base = spawn_single_response_server("application/pdf", fake_pdf_bytes());
@@ -1446,7 +1449,7 @@ fn ownership_import_file_xlsx_supports_ticker_and_releases() {
     let xlsx_path = root.join("peng-2026-08-00017-satu-persen.xlsx");
     fs::write(
         &xlsx_path,
-        include_bytes!("fixtures/ksei_above1_20260831_excerpt.xlsx"),
+        include_bytes!("../../idx-core/tests/fixtures/ksei_above1_20260831_excerpt.xlsx"),
     )
     .expect("write xlsx fixture");
 
@@ -1495,7 +1498,7 @@ fn ownership_import_file_rejects_above5_xlsx() {
     let xlsx_path = root.join("peng-2026-09-23-00080-lima-persen.xlsx");
     fs::write(
         &xlsx_path,
-        include_bytes!("fixtures/ksei_above5_20260923_excerpt.xlsx"),
+        include_bytes!("../../idx-core/tests/fixtures/ksei_above5_20260923_excerpt.xlsx"),
     )
     .expect("write xlsx fixture");
 
@@ -1523,7 +1526,7 @@ fn ownership_import_force_reimports_existing_release() {
     let pdf_path = root.join("force.pdf");
     let fake_mutool_dir = install_fake_mutool(
         &root,
-        include_str!("fixtures/ksei_above1_stext_excerpt.xml"),
+        include_str!("../../idx-core/tests/fixtures/ksei_above1_stext_excerpt.xml"),
     );
     fs::write(&pdf_path, fake_pdf_bytes()).expect("write local pdf fixture");
 
@@ -1571,7 +1574,7 @@ fn ownership_import_url_rejects_legacy_above5_pdf_schema() {
     let data_home = root.join("data");
     let fake_mutool_dir = install_fake_mutool(
         &root,
-        include_str!("fixtures/ksei_above5_stext_excerpt.xml"),
+        include_str!("../../idx-core/tests/fixtures/ksei_above5_stext_excerpt.xml"),
     );
     let pdf_base = spawn_single_response_server("application/pdf", fake_pdf_bytes());
     let pdf_url = pdf_url(&pdf_base, "legacy-above5");
@@ -1593,7 +1596,7 @@ fn ownership_import_url_rejects_legacy_investor_type_pdf_schema() {
     let data_home = root.join("data");
     let fake_mutool_dir = install_fake_mutool(
         &root,
-        include_str!("fixtures/ksei_investor_type_stext_excerpt.xml"),
+        include_str!("../../idx-core/tests/fixtures/ksei_investor_type_stext_excerpt.xml"),
     );
     let pdf_base = spawn_single_response_server("application/pdf", fake_pdf_bytes());
     let pdf_url = pdf_url(&pdf_base, "legacy-investor-type");
@@ -1616,7 +1619,7 @@ fn ownership_import_file_txt_archive_succeeds() {
     let txt_path = root.join("Balancepos20260227.txt");
     fs::write(
         &txt_path,
-        include_str!("fixtures/ksei_balancepos_20260227_excerpt.txt"),
+        include_str!("../../idx-core/tests/fixtures/ksei_balancepos_20260227_excerpt.txt"),
     )
     .expect("write txt archive fixture");
 
@@ -1654,12 +1657,12 @@ fn ownership_import_file_zip_archive_supports_releases_ticker_and_changes() {
     write_zip_with_text(
         &jan_zip,
         "Balancepos20260130.txt",
-        include_str!("fixtures/ksei_balancepos_20260130_excerpt.txt"),
+        include_str!("../../idx-core/tests/fixtures/ksei_balancepos_20260130_excerpt.txt"),
     );
     write_zip_with_text(
         &feb_zip,
         "Balancepos20260227.txt",
-        include_str!("fixtures/ksei_balancepos_20260227_excerpt.txt"),
+        include_str!("../../idx-core/tests/fixtures/ksei_balancepos_20260227_excerpt.txt"),
     );
 
     bin_with_root(&root)
diff --git a/tests/golden.rs b/crates/idx-cli/tests/golden.rs
similarity index 91%
rename from tests/golden.rs
rename to crates/idx-cli/tests/golden.rs
index d6c5aba..e670b9e 100644
--- a/tests/golden.rs
+++ b/crates/idx-cli/tests/golden.rs
@@ -18,7 +18,7 @@ use std::sync::OnceLock;
 use serde::Deserialize;
 
 const IDX: &str = env!("CARGO_BIN_EXE_idx");
-const REPO: &str = env!("CARGO_MANIFEST_DIR");
+const CRATE: &str = env!("CARGO_MANIFEST_DIR");
 
 #[derive(Deserialize)]
 struct CaseFile {
@@ -50,8 +50,17 @@ fn default_formats() -> Vec<String> {
     vec!["table".into(), "json".into()]
 }
 
+/// Commands run from the idx-core crate root: the mock provider and the cases
+/// read fixtures as `tests/fixtures/...` relative to the working directory.
+fn core_dir() -> PathBuf {
+    Path::new(CRATE)
+        .join("../idx-core")
+        .canonicalize()
+        .expect("idx-core crate dir")
+}
+
 fn golden_dir() -> PathBuf {
-    Path::new(REPO).join("tests").join("golden")
+    Path::new(CRATE).join("tests").join("golden")
 }
 
 fn work_dir() -> PathBuf {
@@ -70,7 +79,7 @@ fn idx_with_stdin(
     stdin: Option<&str>,
 ) -> std::process::Output {
     let mut cmd = Command::new(IDX);
-    cmd.current_dir(REPO).args(args);
+    cmd.current_dir(core_dir()).args(args);
     for (key, _) in std::env::vars_os() {
         if key.to_string_lossy().starts_with("IDX_") || key == "NO_COLOR" {
             cmd.env_remove(key);
@@ -105,14 +114,14 @@ fn seeded_ownership_db() -> &'static Path {
         // The importer derives the release from the IDX file name.
         let xlsx = root.join("peng-2026-08-00017-satu-persen.xlsx");
         fs::copy(
-            Path::new(REPO).join("tests/fixtures/ksei_above1_20260831_excerpt.xlsx"),
+            core_dir().join("tests/fixtures/ksei_above1_20260831_excerpt.xlsx"),
             &xlsx,
         )
         .expect("copy xlsx fixture");
         let inputs = [
             xlsx,
-            Path::new(REPO).join("tests/fixtures/ksei_balancepos_20260130_excerpt.txt"),
-            Path::new(REPO).join("tests/fixtures/ksei_balancepos_20260227_excerpt.txt"),
+            core_dir().join("tests/fixtures/ksei_balancepos_20260130_excerpt.txt"),
+            core_dir().join("tests/fixtures/ksei_balancepos_20260227_excerpt.txt"),
         ];
         for input in inputs {
             let args = ["ownership", "import", "--file", input.to_str().unwrap()]
@@ -137,7 +146,7 @@ fn render(root: &Path, out: &std::process::Output) -> String {
     let normalize = |bytes: &[u8]| {
         String::from_utf8_lossy(bytes)
             .replace(root.to_str().unwrap(), "<ROOT>")
-            .replace(REPO, "<REPO>")
+            .replace(core_dir().to_str().unwrap(), "<REPO>")
     };
     format!(
         "exit: {}\n--- stdout\n{}--- stderr\n{}",
diff --git a/tests/golden/auto-format-env-table.golden b/crates/idx-cli/tests/golden/auto-format-env-table.golden
similarity index 100%
rename from tests/golden/auto-format-env-table.golden
rename to crates/idx-cli/tests/golden/auto-format-env-table.golden
diff --git a/tests/golden/auto-format-piped.golden b/crates/idx-cli/tests/golden/auto-format-piped.golden
similarity index 100%
rename from tests/golden/auto-format-piped.golden
rename to crates/idx-cli/tests/golden/auto-format-piped.golden
diff --git a/tests/golden/cache-clear.json.golden b/crates/idx-cli/tests/golden/cache-clear.json.golden
similarity index 100%
rename from tests/golden/cache-clear.json.golden
rename to crates/idx-cli/tests/golden/cache-clear.json.golden
diff --git a/tests/golden/cache-clear.table.golden b/crates/idx-cli/tests/golden/cache-clear.table.golden
similarity index 100%
rename from tests/golden/cache-clear.table.golden
rename to crates/idx-cli/tests/golden/cache-clear.table.golden
diff --git a/tests/golden/cache-info-empty.json.golden b/crates/idx-cli/tests/golden/cache-info-empty.json.golden
similarity index 100%
rename from tests/golden/cache-info-empty.json.golden
rename to crates/idx-cli/tests/golden/cache-info-empty.json.golden
diff --git a/tests/golden/cache-info-empty.table.golden b/crates/idx-cli/tests/golden/cache-info-empty.table.golden
similarity index 100%
rename from tests/golden/cache-info-empty.table.golden
rename to crates/idx-cli/tests/golden/cache-info-empty.table.golden
diff --git a/tests/golden/cases.toml b/crates/idx-cli/tests/golden/cases.toml
similarity index 100%
rename from tests/golden/cases.toml
rename to crates/idx-cli/tests/golden/cases.toml
diff --git a/tests/golden/completions-bash.golden b/crates/idx-cli/tests/golden/completions-bash.golden
similarity index 100%
rename from tests/golden/completions-bash.golden
rename to crates/idx-cli/tests/golden/completions-bash.golden
diff --git a/tests/golden/config-get.golden b/crates/idx-cli/tests/golden/config-get.golden
similarity index 100%
rename from tests/golden/config-get.golden
rename to crates/idx-cli/tests/golden/config-get.golden
diff --git a/tests/golden/config-init.golden b/crates/idx-cli/tests/golden/config-init.golden
similarity index 100%
rename from tests/golden/config-init.golden
rename to crates/idx-cli/tests/golden/config-init.golden
diff --git a/tests/golden/config-output-table-pins-format.golden b/crates/idx-cli/tests/golden/config-output-table-pins-format.golden
similarity index 100%
rename from tests/golden/config-output-table-pins-format.golden
rename to crates/idx-cli/tests/golden/config-output-table-pins-format.golden
diff --git a/tests/golden/config-path.golden b/crates/idx-cli/tests/golden/config-path.golden
similarity index 100%
rename from tests/golden/config-path.golden
rename to crates/idx-cli/tests/golden/config-path.golden
diff --git a/tests/golden/config-set-output-invalid.golden b/crates/idx-cli/tests/golden/config-set-output-invalid.golden
similarity index 100%
rename from tests/golden/config-set-output-invalid.golden
rename to crates/idx-cli/tests/golden/config-set-output-invalid.golden
diff --git a/tests/golden/config-set-output-jsonl.golden b/crates/idx-cli/tests/golden/config-set-output-jsonl.golden
similarity index 100%
rename from tests/golden/config-set-output-jsonl.golden
rename to crates/idx-cli/tests/golden/config-set-output-jsonl.golden
diff --git a/tests/golden/config-set.golden b/crates/idx-cli/tests/golden/config-set.golden
similarity index 100%
rename from tests/golden/config-set.golden
rename to crates/idx-cli/tests/golden/config-set.golden
diff --git a/tests/golden/error-compare-total-failure.json.golden b/crates/idx-cli/tests/golden/error-compare-total-failure.json.golden
similarity index 100%
rename from tests/golden/error-compare-total-failure.json.golden
rename to crates/idx-cli/tests/golden/error-compare-total-failure.json.golden
diff --git a/tests/golden/error-compare-total-failure.table.golden b/crates/idx-cli/tests/golden/error-compare-total-failure.table.golden
similarity index 100%
rename from tests/golden/error-compare-total-failure.table.golden
rename to crates/idx-cli/tests/golden/error-compare-total-failure.table.golden
diff --git a/tests/golden/error-fetch-bing-unsupported.json.golden b/crates/idx-cli/tests/golden/error-fetch-bing-unsupported.json.golden
similarity index 100%
rename from tests/golden/error-fetch-bing-unsupported.json.golden
rename to crates/idx-cli/tests/golden/error-fetch-bing-unsupported.json.golden
diff --git a/tests/golden/error-fetch-bing-unsupported.table.golden b/crates/idx-cli/tests/golden/error-fetch-bing-unsupported.table.golden
similarity index 100%
rename from tests/golden/error-fetch-bing-unsupported.table.golden
rename to crates/idx-cli/tests/golden/error-fetch-bing-unsupported.table.golden
diff --git a/tests/golden/error-industry-only-fundamentals.json.golden b/crates/idx-cli/tests/golden/error-industry-only-fundamentals.json.golden
similarity index 100%
rename from tests/golden/error-industry-only-fundamentals.json.golden
rename to crates/idx-cli/tests/golden/error-industry-only-fundamentals.json.golden
diff --git a/tests/golden/error-industry-only-fundamentals.table.golden b/crates/idx-cli/tests/golden/error-industry-only-fundamentals.table.golden
similarity index 100%
rename from tests/golden/error-industry-only-fundamentals.table.golden
rename to crates/idx-cli/tests/golden/error-industry-only-fundamentals.table.golden
diff --git a/tests/golden/error-invalid-output-env.golden b/crates/idx-cli/tests/golden/error-invalid-output-env.golden
similarity index 100%
rename from tests/golden/error-invalid-output-env.golden
rename to crates/idx-cli/tests/golden/error-invalid-output-env.golden
diff --git a/tests/golden/error-invalid-provider.json.golden b/crates/idx-cli/tests/golden/error-invalid-provider.json.golden
similarity index 100%
rename from tests/golden/error-invalid-provider.json.golden
rename to crates/idx-cli/tests/golden/error-invalid-provider.json.golden
diff --git a/tests/golden/error-invalid-provider.table.golden b/crates/idx-cli/tests/golden/error-invalid-provider.table.golden
similarity index 100%
rename from tests/golden/error-invalid-provider.table.golden
rename to crates/idx-cli/tests/golden/error-invalid-provider.table.golden
diff --git a/tests/golden/error-offline-cache-miss.json.golden b/crates/idx-cli/tests/golden/error-offline-cache-miss.json.golden
similarity index 100%
rename from tests/golden/error-offline-cache-miss.json.golden
rename to crates/idx-cli/tests/golden/error-offline-cache-miss.json.golden
diff --git a/tests/golden/error-offline-cache-miss.table.golden b/crates/idx-cli/tests/golden/error-offline-cache-miss.table.golden
similarity index 100%
rename from tests/golden/error-offline-cache-miss.table.golden
rename to crates/idx-cli/tests/golden/error-offline-cache-miss.table.golden
diff --git a/tests/golden/error-offline-no-cache-flags.json.golden b/crates/idx-cli/tests/golden/error-offline-no-cache-flags.json.golden
similarity index 100%
rename from tests/golden/error-offline-no-cache-flags.json.golden
rename to crates/idx-cli/tests/golden/error-offline-no-cache-flags.json.golden
diff --git a/tests/golden/error-offline-no-cache-flags.table.golden b/crates/idx-cli/tests/golden/error-offline-no-cache-flags.table.golden
similarity index 100%
rename from tests/golden/error-offline-no-cache-flags.table.golden
rename to crates/idx-cli/tests/golden/error-offline-no-cache-flags.table.golden
diff --git a/tests/golden/error-provider-failure.json.golden b/crates/idx-cli/tests/golden/error-provider-failure.json.golden
similarity index 100%
rename from tests/golden/error-provider-failure.json.golden
rename to crates/idx-cli/tests/golden/error-provider-failure.json.golden
diff --git a/tests/golden/error-provider-failure.table.golden b/crates/idx-cli/tests/golden/error-provider-failure.table.golden
similarity index 100%
rename from tests/golden/error-provider-failure.table.golden
rename to crates/idx-cli/tests/golden/error-provider-failure.table.golden
diff --git a/tests/golden/error-screen-region.json.golden b/crates/idx-cli/tests/golden/error-screen-region.json.golden
similarity index 100%
rename from tests/golden/error-screen-region.json.golden
rename to crates/idx-cli/tests/golden/error-screen-region.json.golden
diff --git a/tests/golden/error-screen-region.jsonl.golden b/crates/idx-cli/tests/golden/error-screen-region.jsonl.golden
similarity index 100%
rename from tests/golden/error-screen-region.jsonl.golden
rename to crates/idx-cli/tests/golden/error-screen-region.jsonl.golden
diff --git a/tests/golden/error-screen-region.table.golden b/crates/idx-cli/tests/golden/error-screen-region.table.golden
similarity index 100%
rename from tests/golden/error-screen-region.table.golden
rename to crates/idx-cli/tests/golden/error-screen-region.table.golden
diff --git a/tests/golden/error-stdin-empty.json.golden b/crates/idx-cli/tests/golden/error-stdin-empty.json.golden
similarity index 100%
rename from tests/golden/error-stdin-empty.json.golden
rename to crates/idx-cli/tests/golden/error-stdin-empty.json.golden
diff --git a/tests/golden/error-stdin-empty.table.golden b/crates/idx-cli/tests/golden/error-stdin-empty.table.golden
similarity index 100%
rename from tests/golden/error-stdin-empty.table.golden
rename to crates/idx-cli/tests/golden/error-stdin-empty.table.golden
diff --git a/tests/golden/error-usage-missing-symbol.json.golden b/crates/idx-cli/tests/golden/error-usage-missing-symbol.json.golden
similarity index 100%
rename from tests/golden/error-usage-missing-symbol.json.golden
rename to crates/idx-cli/tests/golden/error-usage-missing-symbol.json.golden
diff --git a/tests/golden/error-usage-missing-symbol.table.golden b/crates/idx-cli/tests/golden/error-usage-missing-symbol.table.golden
similarity index 100%
rename from tests/golden/error-usage-missing-symbol.table.golden
rename to crates/idx-cli/tests/golden/error-usage-missing-symbol.table.golden
diff --git a/tests/golden/error-yahoo-profile-unsupported.json.golden b/crates/idx-cli/tests/golden/error-yahoo-profile-unsupported.json.golden
similarity index 100%
rename from tests/golden/error-yahoo-profile-unsupported.json.golden
rename to crates/idx-cli/tests/golden/error-yahoo-profile-unsupported.json.golden
diff --git a/tests/golden/error-yahoo-profile-unsupported.table.golden b/crates/idx-cli/tests/golden/error-yahoo-profile-unsupported.table.golden
similarity index 100%
rename from tests/golden/error-yahoo-profile-unsupported.table.golden
rename to crates/idx-cli/tests/golden/error-yahoo-profile-unsupported.table.golden
diff --git a/tests/golden/help-cache.golden b/crates/idx-cli/tests/golden/help-cache.golden
similarity index 100%
rename from tests/golden/help-cache.golden
rename to crates/idx-cli/tests/golden/help-cache.golden
diff --git a/tests/golden/help-config.golden b/crates/idx-cli/tests/golden/help-config.golden
similarity index 100%
rename from tests/golden/help-config.golden
rename to crates/idx-cli/tests/golden/help-config.golden
diff --git a/tests/golden/help-ownership.golden b/crates/idx-cli/tests/golden/help-ownership.golden
similarity index 100%
rename from tests/golden/help-ownership.golden
rename to crates/idx-cli/tests/golden/help-ownership.golden
diff --git a/tests/golden/help-root.golden b/crates/idx-cli/tests/golden/help-root.golden
similarity index 100%
rename from tests/golden/help-root.golden
rename to crates/idx-cli/tests/golden/help-root.golden
diff --git a/tests/golden/help-stocks.golden b/crates/idx-cli/tests/golden/help-stocks.golden
similarity index 100%
rename from tests/golden/help-stocks.golden
rename to crates/idx-cli/tests/golden/help-stocks.golden
diff --git a/tests/golden/ownership-changes.json.golden b/crates/idx-cli/tests/golden/ownership-changes.json.golden
similarity index 100%
rename from tests/golden/ownership-changes.json.golden
rename to crates/idx-cli/tests/golden/ownership-changes.json.golden
diff --git a/tests/golden/ownership-changes.jsonl.golden b/crates/idx-cli/tests/golden/ownership-changes.jsonl.golden
similarity index 100%
rename from tests/golden/ownership-changes.jsonl.golden
rename to crates/idx-cli/tests/golden/ownership-changes.jsonl.golden
diff --git a/tests/golden/ownership-changes.table.golden b/crates/idx-cli/tests/golden/ownership-changes.table.golden
similarity index 100%
rename from tests/golden/ownership-changes.table.golden
rename to crates/idx-cli/tests/golden/ownership-changes.table.golden
diff --git a/tests/golden/ownership-concentration.json.golden b/crates/idx-cli/tests/golden/ownership-concentration.json.golden
similarity index 100%
rename from tests/golden/ownership-concentration.json.golden
rename to crates/idx-cli/tests/golden/ownership-concentration.json.golden
diff --git a/tests/golden/ownership-concentration.table.golden b/crates/idx-cli/tests/golden/ownership-concentration.table.golden
similarity index 100%
rename from tests/golden/ownership-concentration.table.golden
rename to crates/idx-cli/tests/golden/ownership-concentration.table.golden
diff --git a/tests/golden/ownership-cross-holders.json.golden b/crates/idx-cli/tests/golden/ownership-cross-holders.json.golden
similarity index 100%
rename from tests/golden/ownership-cross-holders.json.golden
rename to crates/idx-cli/tests/golden/ownership-cross-holders.json.golden
diff --git a/tests/golden/ownership-cross-holders.table.golden b/crates/idx-cli/tests/golden/ownership-cross-holders.table.golden
similarity index 100%
rename from tests/golden/ownership-cross-holders.table.golden
rename to crates/idx-cli/tests/golden/ownership-cross-holders.table.golden
diff --git a/tests/golden/ownership-entity.json.golden b/crates/idx-cli/tests/golden/ownership-entity.json.golden
similarity index 100%
rename from tests/golden/ownership-entity.json.golden
rename to crates/idx-cli/tests/golden/ownership-entity.json.golden
diff --git a/tests/golden/ownership-entity.table.golden b/crates/idx-cli/tests/golden/ownership-entity.table.golden
similarity index 100%
rename from tests/golden/ownership-entity.table.golden
rename to crates/idx-cli/tests/golden/ownership-entity.table.golden
diff --git a/tests/golden/ownership-flow.json.golden b/crates/idx-cli/tests/golden/ownership-flow.json.golden
similarity index 100%
rename from tests/golden/ownership-flow.json.golden
rename to crates/idx-cli/tests/golden/ownership-flow.json.golden
diff --git a/tests/golden/ownership-flow.table.golden b/crates/idx-cli/tests/golden/ownership-flow.table.golden
similarity index 100%
rename from tests/golden/ownership-flow.table.golden
rename to crates/idx-cli/tests/golden/ownership-flow.table.golden
diff --git a/tests/golden/ownership-graph-dot.json.golden b/crates/idx-cli/tests/golden/ownership-graph-dot.json.golden
similarity index 100%
rename from tests/golden/ownership-graph-dot.json.golden
rename to crates/idx-cli/tests/golden/ownership-graph-dot.json.golden
diff --git a/tests/golden/ownership-graph-dot.table.golden b/crates/idx-cli/tests/golden/ownership-graph-dot.table.golden
similarity index 100%
rename from tests/golden/ownership-graph-dot.table.golden
rename to crates/idx-cli/tests/golden/ownership-graph-dot.table.golden
diff --git a/tests/golden/ownership-graph.json.golden b/crates/idx-cli/tests/golden/ownership-graph.json.golden
similarity index 100%
rename from tests/golden/ownership-graph.json.golden
rename to crates/idx-cli/tests/golden/ownership-graph.json.golden
diff --git a/tests/golden/ownership-graph.table.golden b/crates/idx-cli/tests/golden/ownership-graph.table.golden
similarity index 100%
rename from tests/golden/ownership-graph.table.golden
rename to crates/idx-cli/tests/golden/ownership-graph.table.golden
diff --git a/tests/golden/ownership-import-archive-txt.json.golden b/crates/idx-cli/tests/golden/ownership-import-archive-txt.json.golden
similarity index 100%
rename from tests/golden/ownership-import-archive-txt.json.golden
rename to crates/idx-cli/tests/golden/ownership-import-archive-txt.json.golden
diff --git a/tests/golden/ownership-import-archive-txt.table.golden b/crates/idx-cli/tests/golden/ownership-import-archive-txt.table.golden
similarity index 100%
rename from tests/golden/ownership-import-archive-txt.table.golden
rename to crates/idx-cli/tests/golden/ownership-import-archive-txt.table.golden
diff --git a/tests/golden/ownership-import-xlsx.json.golden b/crates/idx-cli/tests/golden/ownership-import-xlsx.json.golden
similarity index 100%
rename from tests/golden/ownership-import-xlsx.json.golden
rename to crates/idx-cli/tests/golden/ownership-import-xlsx.json.golden
diff --git a/tests/golden/ownership-import-xlsx.table.golden b/crates/idx-cli/tests/golden/ownership-import-xlsx.table.golden
similarity index 100%
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rename to crates/idx-cli/tests/golden/yahoo-history.json.golden
diff --git a/tests/golden/yahoo-history.table.golden b/crates/idx-cli/tests/golden/yahoo-history.table.golden
similarity index 100%
rename from tests/golden/yahoo-history.table.golden
rename to crates/idx-cli/tests/golden/yahoo-history.table.golden
diff --git a/tests/golden/yahoo-quote.json.golden b/crates/idx-cli/tests/golden/yahoo-quote.json.golden
similarity index 100%
rename from tests/golden/yahoo-quote.json.golden
rename to crates/idx-cli/tests/golden/yahoo-quote.json.golden
diff --git a/tests/golden/yahoo-quote.table.golden b/crates/idx-cli/tests/golden/yahoo-quote.table.golden
similarity index 100%
rename from tests/golden/yahoo-quote.table.golden
rename to crates/idx-cli/tests/golden/yahoo-quote.table.golden
diff --git a/crates/idx-core/Cargo.toml b/crates/idx-core/Cargo.toml
new file mode 100644
index 0000000..70b9b25
--- /dev/null
+++ b/crates/idx-core/Cargo.toml
@@ -0,0 +1,34 @@
+[package]
+name = "idx-core"
+description = "Data layer for Indonesian stock market (IDX) market, financial, and ownership data"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+repository.workspace = true
+homepage.workspace = true
+readme = "../../README.md"
+keywords = ["idx", "stocks", "indonesia", "finance"]
+categories = ["finance"]
+include = ["/Cargo.toml", "/LICENSE", "/src/**", "/tests/fixtures/**"]
+
+[features]
+default = ["ownership"]
+ownership = ["dep:rusqlite", "dep:quick-xml", "dep:sha2", "dep:zip"]
+# Derives clap::ValueEnum on enums frontends expose as CLI arguments.
+clap = ["dep:clap"]
+
+[dependencies]
+clap = { workspace = true, optional = true }
+ureq.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+toml.workspace = true
+directories = "5"
+chrono.workspace = true
+thiserror = "2"
+fastrand = "2"
+rusqlite = { workspace = true, optional = true }
+quick-xml = { version = "0.37", optional = true }
+sha2 = { workspace = true, optional = true }
+zip = { workspace = true, optional = true }
diff --git a/crates/idx-core/LICENSE b/crates/idx-core/LICENSE
new file mode 120000
index 0000000..30cff74
--- /dev/null
+++ b/crates/idx-core/LICENSE
@@ -0,0 +1 @@
+../../LICENSE
\ No newline at end of file
diff --git a/src/analysis/fundamental.rs b/crates/idx-core/src/analysis/fundamental.rs
similarity index 100%
rename from src/analysis/fundamental.rs
rename to crates/idx-core/src/analysis/fundamental.rs
diff --git a/src/analysis/mod.rs b/crates/idx-core/src/analysis/mod.rs
similarity index 100%
rename from src/analysis/mod.rs
rename to crates/idx-core/src/analysis/mod.rs
diff --git a/src/analysis/signals.rs b/crates/idx-core/src/analysis/signals.rs
similarity index 100%
rename from src/analysis/signals.rs
rename to crates/idx-core/src/analysis/signals.rs
diff --git a/src/analysis/technical.rs b/crates/idx-core/src/analysis/technical.rs
similarity index 100%
rename from src/analysis/technical.rs
rename to crates/idx-core/src/analysis/technical.rs
diff --git a/src/api/mod.rs b/crates/idx-core/src/api/mod.rs
similarity index 100%
rename from src/api/mod.rs
rename to crates/idx-core/src/api/mod.rs
diff --git a/src/api/msn/bing.rs b/crates/idx-core/src/api/msn/bing.rs
similarity index 100%
rename from src/api/msn/bing.rs
rename to crates/idx-core/src/api/msn/bing.rs
diff --git a/src/api/msn/client.rs b/crates/idx-core/src/api/msn/client.rs
similarity index 100%
rename from src/api/msn/client.rs
rename to crates/idx-core/src/api/msn/client.rs
diff --git a/src/api/msn/map.rs b/crates/idx-core/src/api/msn/map.rs
similarity index 100%
rename from src/api/msn/map.rs
rename to crates/idx-core/src/api/msn/map.rs
diff --git a/src/api/msn/mod.rs b/crates/idx-core/src/api/msn/mod.rs
similarity index 100%
rename from src/api/msn/mod.rs
rename to crates/idx-core/src/api/msn/mod.rs
diff --git a/src/api/msn/parse.rs b/crates/idx-core/src/api/msn/parse.rs
similarity index 100%
rename from src/api/msn/parse.rs
rename to crates/idx-core/src/api/msn/parse.rs
diff --git a/src/api/msn/raw_types.rs b/crates/idx-core/src/api/msn/raw_types.rs
similarity index 100%
rename from src/api/msn/raw_types.rs
rename to crates/idx-core/src/api/msn/raw_types.rs
diff --git a/src/api/msn/symbol_ids.tsv b/crates/idx-core/src/api/msn/symbol_ids.tsv
similarity index 100%
rename from src/api/msn/symbol_ids.tsv
rename to crates/idx-core/src/api/msn/symbol_ids.tsv
diff --git a/src/api/msn/symbols.rs b/crates/idx-core/src/api/msn/symbols.rs
similarity index 100%
rename from src/api/msn/symbols.rs
rename to crates/idx-core/src/api/msn/symbols.rs
diff --git a/src/api/types.rs b/crates/idx-core/src/api/types.rs
similarity index 92%
rename from src/api/types.rs
rename to crates/idx-core/src/api/types.rs
index d68d52b..130046d 100644
--- a/src/api/types.rs
+++ b/crates/idx-core/src/api/types.rs
@@ -1,5 +1,4 @@
 use chrono::{DateTime, FixedOffset, NaiveDate};
-use clap::ValueEnum;
 use serde::{Deserialize, Deserializer, Serialize, de::Error as _};
 
 /// Snapshot quote data normalized from Yahoo Finance `/v8/finance/chart` response.
@@ -273,23 +272,24 @@ where
     })
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize, ValueEnum)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[cfg_attr(feature = "clap", derive(clap::ValueEnum))]
 pub enum Period {
-    #[value(name = "1d")]
+    #[cfg_attr(feature = "clap", value(name = "1d"))]
     OneDay,
-    #[value(name = "5d")]
+    #[cfg_attr(feature = "clap", value(name = "5d"))]
     FiveDays,
-    #[value(name = "1mo")]
+    #[cfg_attr(feature = "clap", value(name = "1mo"))]
     OneMonth,
-    #[value(name = "3mo")]
+    #[cfg_attr(feature = "clap", value(name = "3mo"))]
     ThreeMonths,
-    #[value(name = "6mo")]
+    #[cfg_attr(feature = "clap", value(name = "6mo"))]
     SixMonths,
-    #[value(name = "1y")]
+    #[cfg_attr(feature = "clap", value(name = "1y"))]
     OneYear,
-    #[value(name = "2y")]
+    #[cfg_attr(feature = "clap", value(name = "2y"))]
     TwoYears,
-    #[value(name = "5y")]
+    #[cfg_attr(feature = "clap", value(name = "5y"))]
     FiveYears,
 }
 
@@ -308,13 +308,14 @@ impl Period {
     }
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize, ValueEnum)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[cfg_attr(feature = "clap", derive(clap::ValueEnum))]
 pub enum Interval {
-    #[value(name = "1d")]
+    #[cfg_attr(feature = "clap", value(name = "1d"))]
     Day,
-    #[value(name = "1wk")]
+    #[cfg_attr(feature = "clap", value(name = "1wk"))]
     Week,
-    #[value(name = "1mo")]
+    #[cfg_attr(feature = "clap", value(name = "1mo"))]
     Month,
 }
 
diff --git a/src/api/yahoo/client.rs b/crates/idx-core/src/api/yahoo/client.rs
similarity index 100%
rename from src/api/yahoo/client.rs
rename to crates/idx-core/src/api/yahoo/client.rs
diff --git a/src/api/yahoo/map.rs b/crates/idx-core/src/api/yahoo/map.rs
similarity index 100%
rename from src/api/yahoo/map.rs
rename to crates/idx-core/src/api/yahoo/map.rs
diff --git a/src/api/yahoo/mod.rs b/crates/idx-core/src/api/yahoo/mod.rs
similarity index 100%
rename from src/api/yahoo/mod.rs
rename to crates/idx-core/src/api/yahoo/mod.rs
diff --git a/src/api/yahoo/parse.rs b/crates/idx-core/src/api/yahoo/parse.rs
similarity index 100%
rename from src/api/yahoo/parse.rs
rename to crates/idx-core/src/api/yahoo/parse.rs
diff --git a/src/api/yahoo/raw_types.rs b/crates/idx-core/src/api/yahoo/raw_types.rs
similarity index 100%
rename from src/api/yahoo/raw_types.rs
rename to crates/idx-core/src/api/yahoo/raw_types.rs
diff --git a/src/cache.rs b/crates/idx-core/src/cache.rs
similarity index 100%
rename from src/cache.rs
rename to crates/idx-core/src/cache.rs
diff --git a/src/config.rs b/crates/idx-core/src/config.rs
similarity index 75%
rename from src/config.rs
rename to crates/idx-core/src/config.rs
index b7b3ba9..6852533 100644
--- a/src/config.rs
+++ b/crates/idx-core/src/config.rs
@@ -1,14 +1,16 @@
+//! Config file location, provider selection, and `config.toml` read/write.
+//! Presentation settings (output format, color) are resolved by frontends.
+
 use std::fs;
-use std::io::IsTerminal;
 use std::path::PathBuf;
 
-use clap::ValueEnum;
 use directories::ProjectDirs;
 use serde::Deserialize;
 
-use crate::cli::Cli;
 use crate::error::IdxError;
-use crate::output::{OutputFormat, OutputSetting};
+
+/// Values accepted for `general.output`; frontends decide what they mean.
+pub const OUTPUT_VALUES: &[&str] = &["auto", "table", "json", "jsonl"];
 
 #[derive(Debug, Clone, Copy, Deserialize, PartialEq, Eq)]
 #[serde(rename_all = "lowercase")]
@@ -17,9 +19,10 @@ pub enum ProviderKind {
     Msn,
 }
 
-#[derive(Debug, Clone, Copy, Deserialize, ValueEnum, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, Deserialize, PartialEq, Eq)]
+#[cfg_attr(feature = "clap", derive(clap::ValueEnum))]
 #[serde(rename_all = "lowercase")]
-#[value(rename_all = "lower")]
+#[cfg_attr(feature = "clap", value(rename_all = "lower"))]
 pub enum HistoryProviderKind {
     Auto,
     Yahoo,
@@ -34,7 +37,7 @@ impl ProviderKind {
         }
     }
 
-    fn parse(value: &str) -> Result<Self, IdxError> {
+    pub fn parse(value: &str) -> Result<Self, IdxError> {
         if value.eq_ignore_ascii_case("yahoo") {
             Ok(Self::Yahoo)
         } else if value.eq_ignore_ascii_case("msn") {
@@ -56,7 +59,7 @@ impl HistoryProviderKind {
         }
     }
 
-    fn parse(value: &str) -> Result<Self, IdxError> {
+    pub fn parse(value: &str) -> Result<Self, IdxError> {
         if value.eq_ignore_ascii_case("auto") {
             Ok(Self::Auto)
         } else if value.eq_ignore_ascii_case("yahoo") {
@@ -71,129 +74,7 @@ impl HistoryProviderKind {
     }
 }
 
-#[derive(Debug, Clone)]
-pub struct IdxConfig {
-    pub provider: ProviderKind,
-    pub history_provider: HistoryProviderKind,
-    pub exchange: String,
-    pub output: OutputFormat,
-    pub no_color: bool,
-    pub quote_ttl: u64,
-    pub fundamental_ttl: u64,
-}
-
-#[derive(Debug, Deserialize, Default)]
-struct FileConfig {
-    general: Option<FileGeneral>,
-    cache: Option<FileCache>,
-}
-
-#[derive(Debug, Deserialize, Default)]
-struct FileGeneral {
-    provider: Option<ProviderKind>,
-    history_provider: Option<HistoryProviderKind>,
-    exchange: Option<String>,
-    output: Option<OutputSetting>,
-    color: Option<bool>,
-}
-
-#[derive(Debug, Deserialize, Default)]
-struct FileCache {
-    quote_ttl: Option<u64>,
-    fundamental_ttl: Option<u64>,
-}
-
-impl Default for IdxConfig {
-    fn default() -> Self {
-        Self {
-            provider: ProviderKind::Msn,
-            history_provider: HistoryProviderKind::Auto,
-            exchange: "JK".to_string(),
-            output: OutputSetting::Auto.resolve(stdout_is_terminal()),
-            no_color: false,
-            quote_ttl: 300,
-            fundamental_ttl: 3600,
-        }
-    }
-}
-
-impl IdxConfig {
-    pub fn load_with_cli(cli: &Cli) -> Result<Self, IdxError> {
-        let mut cfg = Self::load()?;
-
-        if let Ok(provider) = std::env::var("IDX_PROVIDER") {
-            cfg.provider = ProviderKind::parse(&provider)?;
-        }
-        if let Ok(history_provider) = std::env::var("IDX_HISTORY_PROVIDER") {
-            cfg.history_provider = HistoryProviderKind::parse(&history_provider)?;
-        }
-        if let Ok(exchange) = std::env::var("IDX_EXCHANGE") {
-            cfg.exchange = exchange;
-        }
-        if let Ok(output) = std::env::var("IDX_OUTPUT") {
-            let setting = OutputSetting::parse(&output).ok_or_else(|| {
-                IdxError::ConfigError(format!(
-                    "invalid IDX_OUTPUT value: '{output}', expected 'auto', 'table', 'json', or 'jsonl'"
-                ))
-            })?;
-            cfg.output = setting.resolve(stdout_is_terminal());
-        }
-        if let Ok(no_color) = std::env::var("IDX_NO_COLOR") {
-            cfg.no_color = no_color == "1" || no_color.eq_ignore_ascii_case("true");
-        }
-        if let Some(parsed) = parse_env_ttl("IDX_CACHE_QUOTE_TTL")? {
-            cfg.quote_ttl = parsed;
-        }
-        if let Some(parsed) = parse_env_ttl("IDX_CACHE_FUNDAMENTAL_TTL")? {
-            cfg.fundamental_ttl = parsed;
-        }
-
-        if let Some(output) = cli.output {
-            cfg.output = output.resolve(stdout_is_terminal());
-        }
-        cfg.no_color = cfg.no_color || cli.no_color || !stdout_is_terminal();
-
-        Ok(cfg)
-    }
-
-    pub fn load() -> Result<Self, IdxError> {
-        let mut cfg = Self::default();
-        let path = config_path()?;
-        if path.exists() {
-            let raw = fs::read_to_string(&path).map_err(|e| IdxError::Io(e.to_string()))?;
-            let parsed: FileConfig =
-                toml::from_str(&raw).map_err(|e| IdxError::ConfigError(e.to_string()))?;
-            if let Some(general) = parsed.general {
-                if let Some(provider) = general.provider {
-                    cfg.provider = provider;
-                }
-                if let Some(history_provider) = general.history_provider {
-                    cfg.history_provider = history_provider;
-                }
-                if let Some(exchange) = general.exchange {
-                    cfg.exchange = exchange;
-                }
-                if let Some(output) = general.output {
-                    cfg.output = output.resolve(stdout_is_terminal());
-                }
-                if let Some(color) = general.color {
-                    cfg.no_color = !color;
-                }
-            }
-            if let Some(cache) = parsed.cache {
-                if let Some(v) = cache.quote_ttl {
-                    cfg.quote_ttl = v;
-                }
-                if let Some(v) = cache.fundamental_ttl {
-                    cfg.fundamental_ttl = v;
-                }
-            }
-        }
-        Ok(cfg)
-    }
-}
-
-fn parse_env_ttl(name: &str) -> Result<Option<u64>, IdxError> {
+pub fn parse_env_ttl(name: &str) -> Result<Option<u64>, IdxError> {
     let Ok(raw) = std::env::var(name) else {
         return Ok(None);
     };
@@ -214,10 +95,6 @@ fn parse_env_ttl(name: &str) -> Result<Option<u64>, IdxError> {
     Ok(Some(parsed))
 }
 
-pub fn stdout_is_terminal() -> bool {
-    std::io::stdout().is_terminal()
-}
-
 pub fn default_config_toml() -> String {
     "[general]\nprovider = \"msn\"\nhistory_provider = \"auto\"\nexchange = \"JK\"\noutput = \"auto\"\ncolor = true\n\n[cache]\nquote_ttl = 300\nfundamental_ttl = 3600\n".to_string()
 }
@@ -294,7 +171,7 @@ fn normalize_config_value(key: &str, value: &str) -> Result<toml::Value, IdxErro
             HistoryProviderKind::parse(value)?.as_str().to_string(),
         )),
         "general.output" => {
-            if OutputSetting::parse(value).is_none() {
+            if !OUTPUT_VALUES.iter().any(|v| v.eq_ignore_ascii_case(value)) {
                 return Err(IdxError::InvalidInput(format!(
                     "invalid output format '{value}': expected 'auto', 'table', 'json', or 'jsonl'"
                 )));
@@ -381,17 +258,6 @@ pub fn set_config_value(key: &str, value: &str) -> Result<(), IdxError> {
 
 #[cfg(test)]
 mod tests {
-    use super::IdxConfig;
-
-    #[test]
-    fn default_values_are_sane() {
-        let cfg = IdxConfig::default();
-        assert_eq!(cfg.provider, super::ProviderKind::Msn);
-        assert_eq!(cfg.history_provider, super::HistoryProviderKind::Auto);
-        assert_eq!(cfg.exchange, "JK");
-        assert_eq!(cfg.quote_ttl, 300);
-    }
-
     #[test]
     fn parses_provider_values() {
         assert_eq!(
diff --git a/src/curl_impersonate.rs b/crates/idx-core/src/curl_impersonate.rs
similarity index 100%
rename from src/curl_impersonate.rs
rename to crates/idx-core/src/curl_impersonate.rs
diff --git a/src/error.rs b/crates/idx-core/src/error.rs
similarity index 100%
rename from src/error.rs
rename to crates/idx-core/src/error.rs
diff --git a/crates/idx-core/src/lib.rs b/crates/idx-core/src/lib.rs
new file mode 100644
index 0000000..39170cd
--- /dev/null
+++ b/crates/idx-core/src/lib.rs
@@ -0,0 +1,39 @@
+//! idx-core: retrieval and analysis of Indonesian (IDX) market, financial, and
+//! investor data, shared by the `idx` CLI and other frontends.
+//! See docs/DESIGN.md.
+
+pub mod analysis;
+pub mod api;
+pub mod cache;
+pub mod config;
+pub mod curl_impersonate;
+pub mod error;
+#[cfg(feature = "ownership")]
+pub mod ownership;
+
+pub mod runtime {
+    use std::fmt::Display;
+    use std::sync::atomic::{AtomicBool, Ordering};
+
+    static QUIET: AtomicBool = AtomicBool::new(false);
+
+    pub fn set_quiet(quiet: bool) {
+        QUIET.store(quiet, Ordering::Relaxed);
+    }
+
+    pub fn is_quiet() -> bool {
+        QUIET.load(Ordering::Relaxed)
+    }
+
+    pub fn info(message: impl Display) {
+        if !is_quiet() {
+            eprintln!("info: {message}");
+        }
+    }
+
+    pub fn warn(message: impl Display) {
+        if !is_quiet() {
+            eprintln!("warning: {message}");
+        }
+    }
+}
diff --git a/src/ownership/archive.rs b/crates/idx-core/src/ownership/archive.rs
similarity index 100%
rename from src/ownership/archive.rs
rename to crates/idx-core/src/ownership/archive.rs
diff --git a/src/ownership/db.rs b/crates/idx-core/src/ownership/db.rs
similarity index 99%
rename from src/ownership/db.rs
rename to crates/idx-core/src/ownership/db.rs
index af4b936..d98dbce 100644
--- a/src/ownership/db.rs
+++ b/crates/idx-core/src/ownership/db.rs
@@ -5,7 +5,7 @@ use chrono::NaiveDate;
 use directories::ProjectDirs;
 use rusqlite::{Connection, params};
 
-use crate::config::{IdxConfig, get_config_value};
+use crate::config::get_config_value;
 use crate::error::IdxError;
 use crate::ownership::search;
 use crate::ownership::types::{
@@ -128,8 +128,8 @@ pub fn ensure_schema(conn: &Connection) -> Result<(), IdxError> {
 }
 
 /// Open ownership database connection and run idempotent schema migration.
-pub fn open_db(config: &IdxConfig) -> Result<Connection, IdxError> {
-    let db_path = db_path(config)?;
+pub fn open_db() -> Result<Connection, IdxError> {
+    let db_path = db_path()?;
 
     if let Some(parent) = db_path.parent() {
         fs::create_dir_all(parent).map_err(|e| IdxError::DatabaseError(e.to_string()))?;
@@ -1204,7 +1204,7 @@ pub fn compute_concentration(percentages_bps: &[i64]) -> ConcentrationMetrics {
     }
 }
 
-pub fn db_path(_config: &IdxConfig) -> Result<PathBuf, IdxError> {
+pub fn db_path() -> Result<PathBuf, IdxError> {
     if let Some(custom_path) = get_config_value("ownership.db_path")? {
         let trimmed = custom_path.trim();
         if !trimmed.is_empty() {
diff --git a/src/ownership/entities.rs b/crates/idx-core/src/ownership/entities.rs
similarity index 100%
rename from src/ownership/entities.rs
rename to crates/idx-core/src/ownership/entities.rs
diff --git a/src/ownership/graph.rs b/crates/idx-core/src/ownership/graph.rs
similarity index 100%
rename from src/ownership/graph.rs
rename to crates/idx-core/src/ownership/graph.rs
diff --git a/src/ownership/mod.rs b/crates/idx-core/src/ownership/mod.rs
similarity index 100%
rename from src/ownership/mod.rs
rename to crates/idx-core/src/ownership/mod.rs
diff --git a/src/ownership/parser.rs b/crates/idx-core/src/ownership/parser.rs
similarity index 100%
rename from src/ownership/parser.rs
rename to crates/idx-core/src/ownership/parser.rs
diff --git a/src/ownership/remote.rs b/crates/idx-core/src/ownership/remote.rs
similarity index 100%
rename from src/ownership/remote.rs
rename to crates/idx-core/src/ownership/remote.rs
diff --git a/src/ownership/search.rs b/crates/idx-core/src/ownership/search.rs
similarity index 100%
rename from src/ownership/search.rs
rename to crates/idx-core/src/ownership/search.rs
diff --git a/src/ownership/snapshot.rs b/crates/idx-core/src/ownership/snapshot.rs
similarity index 100%
rename from src/ownership/snapshot.rs
rename to crates/idx-core/src/ownership/snapshot.rs
diff --git a/src/ownership/types.rs b/crates/idx-core/src/ownership/types.rs
similarity index 100%
rename from src/ownership/types.rs
rename to crates/idx-core/src/ownership/types.rs
diff --git a/src/ownership/xlsx.rs b/crates/idx-core/src/ownership/xlsx.rs
similarity index 100%
rename from src/ownership/xlsx.rs
rename to crates/idx-core/src/ownership/xlsx.rs
diff --git a/tests/fixtures/bing_buyers_bbca.json b/crates/idx-core/tests/fixtures/bing_buyers_bbca.json
similarity index 100%
rename from tests/fixtures/bing_buyers_bbca.json
rename to crates/idx-core/tests/fixtures/bing_buyers_bbca.json
diff --git a/tests/fixtures/bing_holders_bbca.json b/crates/idx-core/tests/fixtures/bing_holders_bbca.json
similarity index 100%
rename from tests/fixtures/bing_holders_bbca.json
rename to crates/idx-core/tests/fixtures/bing_holders_bbca.json
diff --git a/tests/fixtures/chart_bbca_1d.json b/crates/idx-core/tests/fixtures/chart_bbca_1d.json
similarity index 100%
rename from tests/fixtures/chart_bbca_1d.json
rename to crates/idx-core/tests/fixtures/chart_bbca_1d.json
diff --git a/tests/fixtures/chart_bbca_3mo.json b/crates/idx-core/tests/fixtures/chart_bbca_3mo.json
similarity index 100%
rename from tests/fixtures/chart_bbca_3mo.json
rename to crates/idx-core/tests/fixtures/chart_bbca_3mo.json
diff --git a/tests/fixtures/chart_bbca_with_gap.json b/crates/idx-core/tests/fixtures/chart_bbca_with_gap.json
similarity index 100%
rename from tests/fixtures/chart_bbca_with_gap.json
rename to crates/idx-core/tests/fixtures/chart_bbca_with_gap.json
diff --git a/tests/fixtures/idx_announcement_kepemilikan.json b/crates/idx-core/tests/fixtures/idx_announcement_kepemilikan.json
similarity index 100%
rename from tests/fixtures/idx_announcement_kepemilikan.json
rename to crates/idx-core/tests/fixtures/idx_announcement_kepemilikan.json
diff --git a/tests/fixtures/idx_share_ownership_page_excerpt.html b/crates/idx-core/tests/fixtures/idx_share_ownership_page_excerpt.html
similarity index 100%
rename from tests/fixtures/idx_share_ownership_page_excerpt.html
rename to crates/idx-core/tests/fixtures/idx_share_ownership_page_excerpt.html
diff --git a/tests/fixtures/ksei_above1_20260831_excerpt.xlsx b/crates/idx-core/tests/fixtures/ksei_above1_20260831_excerpt.xlsx
similarity index 100%
rename from tests/fixtures/ksei_above1_20260831_excerpt.xlsx
rename to crates/idx-core/tests/fixtures/ksei_above1_20260831_excerpt.xlsx
diff --git a/tests/fixtures/ksei_above1_spaced_stext_excerpt.xml b/crates/idx-core/tests/fixtures/ksei_above1_spaced_stext_excerpt.xml
similarity index 100%
rename from tests/fixtures/ksei_above1_spaced_stext_excerpt.xml
rename to crates/idx-core/tests/fixtures/ksei_above1_spaced_stext_excerpt.xml
diff --git a/tests/fixtures/ksei_above1_stext_excerpt.xml b/crates/idx-core/tests/fixtures/ksei_above1_stext_excerpt.xml
similarity index 100%
rename from tests/fixtures/ksei_above1_stext_excerpt.xml
rename to crates/idx-core/tests/fixtures/ksei_above1_stext_excerpt.xml
diff --git a/tests/fixtures/ksei_above1_stext_excerpt_prev.xml b/crates/idx-core/tests/fixtures/ksei_above1_stext_excerpt_prev.xml
similarity index 100%
rename from tests/fixtures/ksei_above1_stext_excerpt_prev.xml
rename to crates/idx-core/tests/fixtures/ksei_above1_stext_excerpt_prev.xml
diff --git a/tests/fixtures/ksei_above5_20260923_excerpt.xlsx b/crates/idx-core/tests/fixtures/ksei_above5_20260923_excerpt.xlsx
similarity index 100%
rename from tests/fixtures/ksei_above5_20260923_excerpt.xlsx
rename to crates/idx-core/tests/fixtures/ksei_above5_20260923_excerpt.xlsx
diff --git a/tests/fixtures/ksei_above5_stext_excerpt.xml b/crates/idx-core/tests/fixtures/ksei_above5_stext_excerpt.xml
similarity index 100%
rename from tests/fixtures/ksei_above5_stext_excerpt.xml
rename to crates/idx-core/tests/fixtures/ksei_above5_stext_excerpt.xml
diff --git a/tests/fixtures/ksei_announcement_wrapper_stext_excerpt.xml b/crates/idx-core/tests/fixtures/ksei_announcement_wrapper_stext_excerpt.xml
similarity index 100%
rename from tests/fixtures/ksei_announcement_wrapper_stext_excerpt.xml
rename to crates/idx-core/tests/fixtures/ksei_announcement_wrapper_stext_excerpt.xml
diff --git a/tests/fixtures/ksei_balancepos_20260130_excerpt.txt b/crates/idx-core/tests/fixtures/ksei_balancepos_20260130_excerpt.txt
similarity index 100%
rename from tests/fixtures/ksei_balancepos_20260130_excerpt.txt
rename to crates/idx-core/tests/fixtures/ksei_balancepos_20260130_excerpt.txt
diff --git a/tests/fixtures/ksei_balancepos_20260227_excerpt.txt b/crates/idx-core/tests/fixtures/ksei_balancepos_20260227_excerpt.txt
similarity index 100%
rename from tests/fixtures/ksei_balancepos_20260227_excerpt.txt
rename to crates/idx-core/tests/fixtures/ksei_balancepos_20260227_excerpt.txt
diff --git a/tests/fixtures/ksei_investor_type_stext_excerpt.xml b/crates/idx-core/tests/fixtures/ksei_investor_type_stext_excerpt.xml
similarity index 100%
rename from tests/fixtures/ksei_investor_type_stext_excerpt.xml
rename to crates/idx-core/tests/fixtures/ksei_investor_type_stext_excerpt.xml
diff --git a/tests/fixtures/ksei_stext_sample.xml b/crates/idx-core/tests/fixtures/ksei_stext_sample.xml
similarity index 100%
rename from tests/fixtures/ksei_stext_sample.xml
rename to crates/idx-core/tests/fixtures/ksei_stext_sample.xml
diff --git a/tests/fixtures/msn_chart_bbca_3m.json b/crates/idx-core/tests/fixtures/msn_chart_bbca_3m.json
similarity index 100%
rename from tests/fixtures/msn_chart_bbca_3m.json
rename to crates/idx-core/tests/fixtures/msn_chart_bbca_3m.json
diff --git a/tests/fixtures/msn_chart_bbca_3mo.json b/crates/idx-core/tests/fixtures/msn_chart_bbca_3mo.json
similarity index 100%
rename from tests/fixtures/msn_chart_bbca_3mo.json
rename to crates/idx-core/tests/fixtures/msn_chart_bbca_3mo.json
diff --git a/tests/fixtures/msn_earnings_bbca.json b/crates/idx-core/tests/fixtures/msn_earnings_bbca.json
similarity index 100%
rename from tests/fixtures/msn_earnings_bbca.json
rename to crates/idx-core/tests/fixtures/msn_earnings_bbca.json
diff --git a/tests/fixtures/msn_financials_bbca.json b/crates/idx-core/tests/fixtures/msn_financials_bbca.json
similarity index 100%
rename from tests/fixtures/msn_financials_bbca.json
rename to crates/idx-core/tests/fixtures/msn_financials_bbca.json
diff --git a/tests/fixtures/msn_insights_bbca.json b/crates/idx-core/tests/fixtures/msn_insights_bbca.json
similarity index 100%
rename from tests/fixtures/msn_insights_bbca.json
rename to crates/idx-core/tests/fixtures/msn_insights_bbca.json
diff --git a/tests/fixtures/msn_keyratios_bbca.json b/crates/idx-core/tests/fixtures/msn_keyratios_bbca.json
similarity index 100%
rename from tests/fixtures/msn_keyratios_bbca.json
rename to crates/idx-core/tests/fixtures/msn_keyratios_bbca.json
diff --git a/tests/fixtures/msn_keyratios_industry_only.json b/crates/idx-core/tests/fixtures/msn_keyratios_industry_only.json
similarity index 100%
rename from tests/fixtures/msn_keyratios_industry_only.json
rename to crates/idx-core/tests/fixtures/msn_keyratios_industry_only.json
diff --git a/tests/fixtures/msn_keyratios_infinity.json b/crates/idx-core/tests/fixtures/msn_keyratios_infinity.json
similarity index 100%
rename from tests/fixtures/msn_keyratios_infinity.json
rename to crates/idx-core/tests/fixtures/msn_keyratios_infinity.json
diff --git a/tests/fixtures/msn_keyratios_negative_infinity.json b/crates/idx-core/tests/fixtures/msn_keyratios_negative_infinity.json
similarity index 100%
rename from tests/fixtures/msn_keyratios_negative_infinity.json
rename to crates/idx-core/tests/fixtures/msn_keyratios_negative_infinity.json
diff --git a/tests/fixtures/msn_news_bbca.json b/crates/idx-core/tests/fixtures/msn_news_bbca.json
similarity index 100%
rename from tests/fixtures/msn_news_bbca.json
rename to crates/idx-core/tests/fixtures/msn_news_bbca.json
diff --git a/tests/fixtures/msn_profile_bbca.json b/crates/idx-core/tests/fixtures/msn_profile_bbca.json
similarity index 100%
rename from tests/fixtures/msn_profile_bbca.json
rename to crates/idx-core/tests/fixtures/msn_profile_bbca.json
diff --git a/tests/fixtures/msn_quote_bbca.json b/crates/idx-core/tests/fixtures/msn_quote_bbca.json
similarity index 100%
rename from tests/fixtures/msn_quote_bbca.json
rename to crates/idx-core/tests/fixtures/msn_quote_bbca.json
diff --git a/tests/fixtures/msn_screener_id_topperfs.json b/crates/idx-core/tests/fixtures/msn_screener_id_topperfs.json
similarity index 100%
rename from tests/fixtures/msn_screener_id_topperfs.json
rename to crates/idx-core/tests/fixtures/msn_screener_id_topperfs.json
diff --git a/tests/fixtures/msn_sentiment_bbca.json b/crates/idx-core/tests/fixtures/msn_sentiment_bbca.json
similarity index 100%
rename from tests/fixtures/msn_sentiment_bbca.json
rename to crates/idx-core/tests/fixtures/msn_sentiment_bbca.json
diff --git a/tests/fixtures/quotesummary_bbca.json b/crates/idx-core/tests/fixtures/quotesummary_bbca.json
similarity index 100%
rename from tests/fixtures/quotesummary_bbca.json
rename to crates/idx-core/tests/fixtures/quotesummary_bbca.json
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 030e959..7f6789e 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -1,10 +1,25 @@
 # Architecture
 
+## Crates
+
+The repo is a Cargo workspace with one shared version:
+
+- `crates/idx-core` (library): providers (`api/`), `analysis/`, `cache`, config
+  file handling and provider selection (`config`), `ownership/` (SQLite, parsers,
+  discovery, snapshot sync), `error`, and `runtime` (quiet/info/warn). It owns the
+  shared test fixtures in `tests/fixtures/`.
+- `crates/idx-cli` (binary `idx`): clap commands (`cli/`), output format and
+  color resolution (`config.rs`, `IdxConfig`), and rendering (`output/`). Its
+  `tests/` hold the CLI integration and golden output suites.
+
+Some fetch/cache orchestration still lives in `crates/idx-cli/src/cli/` until
+phase 3 of `docs/DESIGN.md` moves it into idx-core.
+
 ## Domain Map
 
 ```
 ┌─────────────────────────────────────────────────────────┐
-│                      CLI Layer                           │
+│                 CLI Layer (idx-cli)                      │
 │  main.rs → cli/stocks.rs, cli/ownership.rs, cli/...     │
 │  Clap derive structs, command dispatch, arg validation   │
 └──────────────────────┬──────────────────────────────────┘
@@ -39,7 +54,7 @@
   sentiment, screener
 - `https://api.msn.com/msn/v0/pages/finance/`: key ratios, insights, news feed
 
-The public API key embedded in MSN Money lives in `src/api/msn/client.rs`.
+The public API key embedded in MSN Money lives in `crates/idx-core/src/api/msn/client.rs`.
 
 ### Hybrid History Strategy
 When `history_provider = auto` (default):
@@ -89,7 +104,7 @@ Unlike the `stocks` module (live-fetch), ownership is **import-then-query**:
 - **KSEI** — official ≥1% shareholder registry, published monthly by IDX. Through May 2026 it was a PDF announcement; from the 2026-05-29 report onward it is an XLSX workbook on the IDX "Data Kepemilikan Saham" page
 - **KSEI archive** — monthly ZIP/TXT balance-position matrix, used as a local fallback/backstop import path
 - **Bing Finance** — global institutional ownership. The schema, `--source bing`
-  queries, and `src/api/msn/bing.rs` exist, but `ownership import --fetch-bing`
+  queries, and `crates/idx-core/src/api/msn/bing.rs` exist, but `ownership import --fetch-bing`
   is intentionally unsupported, so no ingest path populates Bing rows today
 
 ### Discovery
diff --git a/docs/DESIGN.md b/docs/DESIGN.md
index fbe9c3f..56615f8 100644
--- a/docs/DESIGN.md
+++ b/docs/DESIGN.md
@@ -1,6 +1,6 @@
 # System Design: idx-core and its frontends
 
-**Status:** Accepted 2026-10-14. Implementation on `refactor/idx-core`; phases 0-1 done.
+**Status:** Accepted 2026-10-14. Implementation on `refactor/idx-core`; phases 0-2 done.
 
 ## Goal
 
@@ -99,7 +99,7 @@ Key decisions:
 - **Typed inputs.** Screener filters, regions, statement and earnings filters
   become enums with `FromStr`, so validation is identical across frontends.
 
-## What Moves Out of `src/cli/`
+## What Moves Out of `crates/idx-cli/src/cli/`
 
 | From | To |
 | --- | --- |
diff --git a/flake.nix b/flake.nix
index 7f5d170..c83465c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,6 +18,7 @@
         pkgs = import nixpkgs { inherit system overlays; };
         lib = pkgs.lib;
         cargoManifest = builtins.fromTOML (builtins.readFile ./Cargo.toml);
+        version = cargoManifest.workspace.package.version;
         rustToolchain = pkgs.rust-bin.stable.latest.default.override {
           extensions = [ "rust-src" "rust-analyzer" ];
         };
@@ -31,12 +32,15 @@
         rustFiles = [
           ./Cargo.toml
           ./Cargo.lock
-          ./src
-          ./tests/fixtures
+          ./crates/idx-core/Cargo.toml
+          ./crates/idx-core/src
+          ./crates/idx-core/tests/fixtures
+          ./crates/idx-cli/Cargo.toml
+          ./crates/idx-cli/src
         ];
         testSrc = lib.fileset.toSource {
           root = ./.;
-          fileset = lib.fileset.unions (rustFiles ++ [ ./tests ]);
+          fileset = lib.fileset.unions (rustFiles ++ [ ./crates/idx-cli/tests ]);
         };
         src = lib.fileset.toSource {
           root = ./.;
@@ -44,8 +48,8 @@
         };
         commonArgs = {
           inherit src;
-          pname = cargoManifest.package.name;
-          version = cargoManifest.package.version;
+          pname = "idx-cli";
+          inherit version;
           CARGO_PROFILE = "dev";
           strictDeps = true;
           nativeBuildInputs = with pkgs; [ pkg-config ];
@@ -90,7 +94,7 @@
         ];
         ownershipPublisher = pkgs.stdenvNoCC.mkDerivation {
           pname = "idx-ownership-publisher";
-          version = cargoManifest.package.version;
+          inherit version;
           src = lib.fileset.toSource {
             root = ./.;
             fileset = lib.fileset.unions publisherScripts;
@@ -155,7 +159,7 @@
             ${ownershipPublisher}/bin/idx-ownership-publish --help
             touch "$out"
           '';
-          fmt = craneLib.cargoFmt { src = testSrc; };
+          fmt = craneLib.cargoFmt { src = testSrc; pname = "idx-cli"; inherit version; };
           clippy = craneLib.cargoClippy (commonArgs // {
             inherit cargoArtifacts;
             src = testSrc;
@@ -172,20 +176,39 @@
             # `curl` against a local fixture server.
             nativeCheckInputs = [ pkgs.curl ];
           });
-          # `cargo package` verification: the published crate (per the
-          # `include` list in Cargo.toml) must build on its own.
+          # `cargo package` verification: each published crate (per the
+          # `include` lists in crates/*/Cargo.toml) must build on its own.
           package = craneLib.mkCargoDerivation (commonArgs // {
             inherit cargoArtifacts;
             pnameSuffix = "-package";
             src = lib.fileset.toSource {
               root = ./.;
               fileset = lib.fileset.unions (rustFiles ++ [
-                ./tests
+                ./crates/idx-cli/tests
+                ./crates/idx-core/LICENSE
+                ./crates/idx-cli/LICENSE
                 ./LICENSE
                 ./README.md
               ]);
             };
-            buildPhaseCargoCommand = "cargo package --locked --offline --allow-dirty";
+            buildPhaseCargoCommand = ''
+              # idx-core: full `cargo package` verification.
+              cargo package -p idx-core --registry crates-io --locked --offline --allow-dirty
+              # idx-cli depends on idx-core, which is not on crates.io yet, so
+              # cargo cannot resolve it from the vendored registry. Package
+              # idx-cli without lockfile or verification, then build the
+              # extracted tarball against the packaged idx-core. Real releases
+              # publish idx-core first and package idx-cli normally.
+              cargo package -p idx-cli --registry crates-io --no-verify --exclude-lockfile --offline --allow-dirty
+              verify="$TMPDIR/package-verify"
+              mkdir -p "$verify"
+              tar -xzf target/package/idx-core-${version}.crate -C "$verify"
+              tar -xzf target/package/idx-cli-${version}.crate -C "$verify"
+              cp Cargo.lock "$verify/idx-cli-${version}/"
+              (cd "$verify/idx-cli-${version}" && cargo build --offline \
+                --config 'patch.crates-io.idx-core.path="../idx-core-${version}"' \
+                --target-dir "$verify/target")
+            '';
             doInstallCargoArtifacts = false;
             installPhaseCommand = "touch $out";
           });
@@ -196,7 +219,7 @@
             ''
               # The mock provider reads fixtures relative to the working dir.
               mkdir -p tests
-              cp -r ${./tests/fixtures} tests/fixtures
+              cp -r ${./crates/idx-core/tests/fixtures} tests/fixtures
               export HOME="$TMPDIR"
               ${idxPackage}/bin/idx -o json version | jq -e '.version | type == "string"'
               ${idxPackage}/bin/idx completions bash | bash -n