agnes-the-ai-analyst/CLAUDE.md

AI Data Analyst

Open-source data distribution platform for AI analytical systems. Extracts data from sources into DuckDB, serves via FastAPI, and distributes parquets to analysts who use Claude Code for local analysis.

First-Time Setup

When a user opens this project for the first time, guide them through interactive setup:

Step 1: Gather Information

Ask the user for:

1. Company domain (e.g., "acme.com") - used for Google OAuth
2. Data source type: keboola / bigquery / csv
3. Instance name (e.g., "Acme Data Analyst")

Step 2: Generate Configuration

1. Copy config/instance.yaml.example to config/instance.yaml
2. Fill in values from Step 1
3. If Keboola: ask for Storage API token, stack URL, project ID
4. Create .env from config/.env.template

Step 3: Register Tables

1. Use the FastAPI admin API (POST /api/admin/register-table, then PUT /api/admin/registry/{id} for updates) or webapp UI to register tables
2. Tables are stored in DuckDB table_registry with source_type, bucket, source_table, query_mode
3. For migration from old format: python scripts/migrate_registry_to_duckdb.py

Step 4: Docker Deployment

docker compose up          # Start app + scheduler
docker compose --profile full up  # Include telegram bot

# HTTPS mode — Caddy + corporate-CA certs at /data/state/certs
docker compose -f docker-compose.yml -f docker-compose.prod.yml -f docker-compose.tls.yml \
    --profile tls up -d

See docs/DEPLOYMENT.md → TLS for cert provisioning + scripts/ops/agnes-tls-rotate.sh (daily refetch from TLS_FULLCHAIN_URL, SIGUSR1 reload on diff, no-op when unchanged). The infra repo's startup.sh installs this as a systemd timer automatically.

Project Structure

├── src/                    # Core engine
│   ├── db.py               # DuckDB schema (system.duckdb, analytics.duckdb)
│   ├── orchestrator.py     # SyncOrchestrator — ATTACHes extract.duckdb files
│   ├── repositories/       # DuckDB-backed CRUD (sync_state, table_registry, users, etc.)
│   ├── profiler.py         # Data profiling
│   └── catalog_export.py   # OpenMetadata catalog export
├── app/                    # FastAPI application
│   ├── main.py             # App setup, router registration
│   ├── api/                # REST API (sync, data, catalog, admin, auth)
│   └── web/                # HTML dashboard routes
├── connectors/             # Data source connectors (extract.duckdb contract)
│   ├── keboola/            # Keboola: extractor.py (DuckDB extension) + client.py (fallback)
│   ├── bigquery/           # BigQuery: extractor.py (remote-only via DuckDB BQ extension)
│   └── jira/               # Jira: webhook + incremental parquet → extract.duckdb
├── cli/                    # CLI tool (`agnes pull`, `agnes query`, `agnes admin`)
├── app/auth/               # Authentication (FastAPI-based providers)
├── services/               # Standalone services (scheduler, telegram_bot, ws_gateway, etc.)
├── server/                 # Legacy deployment infrastructure
├── scripts/                # Utility + migration scripts
├── config/                 # Configuration templates (instance.yaml.example)
├── docs/                   # Documentation + metric YAML definitions
└── tests/                  # Test suite (633 tests)

Architecture: extract.duckdb Contract

Every data source produces the same output:

/data/extracts/{source_name}/
├── extract.duckdb          ← _meta table + views
└── data/                   ← parquet files (local sources only)

Remote table support (_remote_attach)

Extractors with remote/passthrough tables (query_mode='remote') include a _remote_attach table in extract.duckdb so the orchestrator can re-ATTACH the external DuckDB extension at query time:

CREATE TABLE _remote_attach (
    alias     VARCHAR,  -- DuckDB alias used in views, e.g. 'kbc'
    extension VARCHAR,  -- Extension name, e.g. 'keboola'
    url       VARCHAR,  -- Connection URL
    token_env VARCHAR   -- Env-var name holding the auth token, OR empty for
                        -- extensions with built-in auth (e.g. BigQuery uses the
                        -- GCE metadata server — see `connectors/bigquery/auth.py`).
);

The orchestrator reads this table, installs/loads the extension, fetches the token (via token_env lookup, or via the extension-specific auth path when token_env=''), creates a session-scoped DuckDB SECRET when the extension requires one (BigQuery), and ATTACHes the external source. Views referencing kbc."bucket"."table" then resolve correctly. This mechanism is generic — any connector can plug in.

The SyncOrchestrator scans /data/extracts/*/extract.duckdb, ATTACHes each into master analytics.duckdb, and creates views.

┌──────────────┐  ┌──────────────┐  ┌──────────────┐
│   Keboola    │  │   BigQuery   │  │   Jira       │
│  extractor   │  │  extractor   │  │  webhooks    │
│ (DuckDB ext) │  │ (remote BQ)  │  │ (incremental)│
└──────┬───────┘  └──────┬───────┘  └──────┬───────┘
       │                 │                 │
       ▼                 ▼                 ▼
   extract.duckdb    extract.duckdb    extract.duckdb
   + data/*.parquet  (views → BQ)      + data/*.parquet
       │                 │                 │
       └─────────────────┼─────────────────┘
                         ▼
              SyncOrchestrator.rebuild()
              ATTACH → master views in analytics.duckdb
                         │
              ┌──────────┼──────────┐
              ▼          ▼          ▼
          FastAPI      CLI
          (serve)    (agnes pull)

Source modes:

• Batch pull (Keboola, query_mode='local'): DuckDB extension downloads to parquet, scheduled
• Remote attach (BigQuery, query_mode='remote'): DuckDB BQ extension, no download, queries go to BQ
• Materialized SQL (BigQuery, query_mode='materialized'): scheduler runs admin-registered SQL through DuckDB BQ extension (via BqAccess from connectors/bigquery/access.py) and writes the result to /data/extracts/bigquery/data/<id>.parquet. Distributed via the same manifest + agnes pull flow as Keboola tables. Cost guardrail via data_source.bigquery.max_bytes_per_materialize (default 10 GiB; set 0 to disable — YAML null falls through to the default).
• Real-time push (Jira): Webhooks update parquets incrementally

Configuration

Instance-specific config: config/instance.yaml (see example). Environment variables: .env (never committed). Table definitions: DuckDB table_registry table in system.duckdb.

Development

# Setup
python3 -m venv .venv && source .venv/bin/activate
uv pip install ".[dev]"

# Run FastAPI locally
uvicorn app.main:app --reload

# Run tests
pytest tests/ -v

# Trigger sync manually
curl -X POST http://localhost:8000/api/sync/trigger

# Docker
docker compose up

Local sync & Claude Code hooks

agnes pull is the canonical analyst-side distribution path: pulls the RBAC-filtered manifest from the server, downloads parquets whose MD5 changed (skipping query_mode='remote' rows), rebuilds local DuckDB views over them. agnes push mirrors it for the upload direction (sessions, CLAUDE.local.md).

agnes init writes two hooks into <workspace>/.claude/settings.json:

• SessionStart → agnes pull --quiet — pulls fresh parquets at the start of every Claude Code session
• SessionEnd → agnes push --quiet — uploads session jsonl + CLAUDE.local.md to the server

Both pass --quiet so they don't pollute Claude Code stdout, and trail with || true so a server outage never blocks a session. Workspace-level (not user-home) so the hooks fire only when Claude Code opens this analyst workspace, not in unrelated sessions on the same machine.

Admin RBAC for auto-sync: query_mode IN ('local', 'materialized') plus a resource_grants row for one of the analyst's groups → table appears in their manifest → agnes pull downloads it. No per-user sync config; the admin layer is the single source of truth.

Business Metrics

Standardized metric definitions live in DuckDB (metric_definitions table). Import starter pack:

agnes admin metrics import docs/metrics/

For AI agents analyzing data:

Before computing any business metric, look up the canonical definition:

1. agnes catalog --metrics — find the relevant metric
2. agnes catalog --metrics --show revenue/mrr — read the SQL and business rules
3. Use the SQL from the metric definition, adapt to the specific question

Never invent metric calculations — always use the canonical definitions.

Querying Agnes data — agent rails

When asked about ANY data in Agnes, follow this protocol.

Discovery first

Before writing ANY query against a table, run:

agnes catalog --json | jq <filter>     # know what's available
agnes schema <table>                   # learn columns + types
agnes describe <table> -n 5            # see real values for shape

NEVER write SELECT * FROM <table> blindly. For local-mode tables it's wasteful; for remote-mode tables it can blow up at 225M rows.

Choose the right tool

Tables in agnes catalog have a query_mode:

• local: data is on the laptop as parquet (synced via agnes pull). Query directly with agnes query "SELECT … FROM <table>".

• remote (typically BigQuery): the parquet does NOT exist on the laptop. You MUST either:

  1. agnes snapshot create a filtered subset → query the local snapshot, OR
  2. agnes query --remote for one-shot server-side execution. Works on all query_mode='remote' rows regardless of upstream BQ entity type (BASE TABLE → Storage Read API with predicate pushdown; VIEW / MATERIALIZED_VIEW → BQ jobs API, no pushdown). Cost-guarded by a 5 GiB scan cap (configurable in /admin/server-config). Direct bq."<dataset>"."<table>" paths are registry-gated — unregistered paths return 403 bq_path_not_registered.
  3. agnes query --register-bq for hybrid joins (rarely needed).

agnes snapshot create workflow (preferred for remote tables)

# 1. estimate first
agnes snapshot create web_sessions_example \
    --select event_date,country_code,session_id \
    --where "event_date >= DATE_SUB(CURRENT_DATE(), INTERVAL 30 DAY) 
             AND country_code = 'CZ'" \
    --estimate
# → "estimated_scan_bytes: 4.2 GB, result: ~250k rows, 12 MB locally"

# 2. if reasonable, fetch
agnes snapshot create web_sessions_example ... --as cz_recent

# 3. query the local snapshot
agnes query "SELECT event_date, COUNT(*) FROM cz_recent GROUP BY 1 ORDER BY 1"

Heuristics for agnes snapshot create

• ALWAYS list specific columns in --select. Avoid implicit SELECT *.
• ALWAYS include a --where for remote tables; otherwise add --limit.
• ALWAYS run --estimate first when:
  • You're not sure of the data shape
  • The table has partition_by or clustered_by set (per agnes schema)
  • The fetch could plausibly exceed 1 GB local bytes
• Reuse agnes snapshot list before fetching — if a snapshot covers your query already, skip the fetch.

BigQuery SQL flavor for --where

For source_type=bigquery (per agnes catalog):

• Date literal: DATE '2026-01-01' (NOT '2026-01-01'::date)
• Timestamp literal: TIMESTAMP '2026-01-01 00:00:00 UTC'
• Now: CURRENT_DATE(), CURRENT_TIMESTAMP()
• Date arithmetic: DATE_SUB(CURRENT_DATE(), INTERVAL 30 DAY)
• Regex: REGEXP_CONTAINS(col, r'pattern') (raw string!)
• NULL: col IS NOT NULL (standard)
• Cast: CAST(x AS INT64) (NOT INT)

For source_type=keboola / source_type=jira (local), use DuckDB SQL flavor in your agnes query calls — there's no --where on local since fetch is implicit.

Snapshot hygiene

• Reuse snapshots across questions in the same conversation.
• Use descriptive names: cz_recent, orders_q1_us, sessions_today.
• Drop with agnes snapshot drop <name> when done with a topic.
• agnes disk-info to see total cache size.

When NOT to use agnes snapshot create

• Single aggregate on remote BASE TABLE (SELECT COUNT(*) FROM remote): use agnes query --remote "SELECT COUNT(*) FROM web_sessions_example". Storage Read API pushes the COUNT into BQ — cheap, no materialization.
• Single aggregate on remote VIEW/MATERIALIZED_VIEW: same syntax works (#160), but the BQ jobs API can't push WHERE/COUNT into the view body. Cost guardrail (default 5 GiB) catches expensive scans → 400 remote_scan_too_large with agnes snapshot create suggestion. Pivot to agnes snapshot create <id> --where '<predicate>' if the cap is hit.
• Throwaway exploration: agnes query --remote "SELECT … FROM <registered_id>". Direct bq."<dataset>"."<table>" paths are now registry-gated — register first or use the catalog id.
• Cross-table JOIN with both tables remote: combine agnes snapshot create for one side + agnes query --remote for the other; full cross-remote JOIN requires more thought (see #101 for design space).

Marketplace Repositories

Admin-managed git repos cloned nightly to ${DATA_DIR}/marketplaces/<slug>/ so FastAPI can read their contents from disk.

• Register via /admin/marketplaces (admin UI) or POST /api/marketplaces.
• Scheduler calls POST /api/marketplaces/sync-all (admin-only, authed via SCHEDULER_API_TOKEN) at daily 03:00 UTC. Routing through HTTP keeps the app the sole writer to system.duckdb — the previous in-process call from the scheduler container raced the app's long-lived DB handle and 500-ed on Could not set lock on file.
• Manual re-sync from the UI ("Sync now") hits POST /api/marketplaces/{id}/sync.
• PATs for private repos persist to ${DATA_DIR}/state/.env_overlay (chmod 600) as AGNES_MARKETPLACE_<SLUG>_TOKEN. DuckDB stores only the env-var name (token_env), never the secret.
• Registry lives in DuckDB table marketplace_registry (schema v9).
• After each successful sync, src/marketplace.py parses .claude-plugin/marketplace.json from the cloned repo and caches the plugin list in marketplace_plugins (keyed by (marketplace_id, plugin_name)).
• src/marketplace.py handles clone/fetch/reset with token redaction in any surfaced error message.

Access control (v13)

Two layers, no role hierarchy. Full reference: docs/RBAC.md.

• user_groups — named groups. Two seeded as is_system=TRUE at startup: Admin (god-mode short-circuit on every authorization check) and Everyone (auto-membership for every user).
• user_group_members — (user_id, group_id, source). source ∈ {admin, google_sync, system_seed} so each writer only manipulates its own rows; Google's nightly DELETE+INSERT does not clobber admin-added members.
• resource_grants — generic (group, resource_type, resource_id) triple. Replaces plugin_access from v12; the same shape now covers any future entity-scoped grant (datasets, knowledge categories, …).

Resource types are an app.resource_types.ResourceType StrEnum paired with a ResourceTypeSpec registered in RESOURCE_TYPES — adding a new one is one enum member, one list_blocks(conn) delegate (projects domain tables into the (block → items) shape the /admin/access tree renders), and one spec entry. No DB migration, no second wiring step. Endpoints gate with either require_admin (app-level) or require_resource_access(ResourceType.X, "{path}") (entity-level), both from app.auth.access.

Admin UI: /admin/access. CLI: agnes admin group {list,create,delete,members, add-member,remove-member} and agnes admin grant {list,create,delete}.

Claude Code marketplace endpoint

Agnes serves a single aggregated Claude Code marketplace over two channels, both gated by PAT auth and filtered per caller:

• GET /marketplace.zip — deterministic ZIP download with ETag / If-None-Match (304 when content unchanged). Consumed by a client-side SessionStart hook.
• GET /marketplace.git/* — git smart-HTTP (dulwich via a2wsgi). Registered in Claude Code once, then Claude Code owns the clone/fetch cycle.

Auth: ZIP uses Authorization: Bearer <PAT>. Git uses HTTP Basic where the password field carries the PAT (https://x:<PAT>@host/marketplace.git/) — git CLI does not speak Bearer.

Content: filtered via src.marketplace_filter.resolve_allowed_plugins which joins resource_grants ↔ marketplace_plugins (matching mp.marketplace_id || '/' || mp.name = rg.resource_id) scoped to the caller's user_group_members. Admin is treated as a regular group here — no god-mode shortcut for the marketplace feed, so admins curate their own view by granting plugins to the Admin group (or any group they belong to). On-disk layout in the served ZIP / git tree uses a slug-prefixed directory (plugins/<slug>-<plugin>/) so two marketplaces shipping a same-named plugin don't overwrite each other's files. The synth marketplace.json's name field, however, is the plugin's authoritative name from its own .claude-plugin/plugin.json (with a fallback to the upstream marketplace.json name) — Claude Code's /plugin UI resolves a loaded plugin back to its catalog entry by plugin.json name, so the catalog entry's name must match. Same-named plugins from two upstream marketplaces therefore collide in the catalog by design; admin RBAC (which grants survive the filter) decides which one wins, identical to how Claude Code behaves when a user adds two upstream marketplaces with overlapping plugin names directly. /marketplace/info exposes both name and prefixed_name so operators can disambiguate.

Cache: content-addressed bare repos at ${DATA_DIR}/marketplaces/git-cache/ keyed by sha256(filtered content). Two users with the same RBAC view share one repo; content change → new repo next to the old one. No TTL / prune yet.

User registration inside Claude Code:

# ZIP channel (typically via a SessionStart hook that unpacks into ./marketplace/)
curl -H "Authorization: Bearer $AGNES_PAT" https://agnes.example.com/marketplace.zip

# Git channel — one-time registration. Two paths; pick the first that works.

# (a) Direct registration — preferred when it works.
/plugin marketplace add https://x:$AGNES_PAT@agnes.example.com/marketplace.git/

# (b) Two-step fallback — required when (a) fails. Bun-compiled `claude` on
#     macOS / Windows ignores the OS trust store and CA env vars on the
#     marketplace HTTPS path, so direct add can fail with TLS errors against
#     a private-CA Agnes instance even when system tools work fine. System
#     `git` honors GIT_SSL_CAINFO + the OS trust store, so cloning manually
#     and pointing Claude Code at the local clone sidesteps the Bun TLS path
#     entirely.
git clone https://x:$AGNES_PAT@agnes.example.com/marketplace.git/ ~/agnes-marketplace
claude plugin marketplace add ~/agnes-marketplace
# Optional hardening: strip the PAT from the cloned repo's origin so it
# doesn't sit in plaintext at ~/agnes-marketplace/.git/config — re-clone via
# the dashboard's setup flow when the PAT rotates.
git -C ~/agnes-marketplace remote set-url origin https://agnes.example.com/marketplace.git/

The dashboard-served setup payload (see app/web/setup_instructions.py) already branches between (a) and (b) automatically based on platform when a private CA is in play. The block above is the manual equivalent for users registering outside that flow (e.g. operators bringing up a new instance, or analysts whose first attempt failed and need to retry by hand).

Hybrid Queries (BigQuery + Local)

For tables too large to sync locally, use hybrid queries that JOIN local data with on-demand BigQuery results:

agnes query --sql "SELECT o.*, t.views FROM orders o JOIN traffic t ON o.date = t.date" \
         --register-bq "traffic=SELECT date, SUM(views) as views FROM dataset.web WHERE date > '2026-01-01' GROUP BY 1"

The --register-bq flag executes a BigQuery subquery, loads the result into memory, and makes it available as a DuckDB view for the final SQL. Multiple --register-bq flags can be used for multiple BQ sources.

For complex SQL, use stdin mode:

echo '{"register_bq": {"traffic": "SELECT ..."}, "sql": "SELECT ..."}' | agnes query --stdin

Extensibility

Data Sources (extract.duckdb contract)

New connector = connectors/<name>/extractor.py producing extract.duckdb + data/. Must create _meta table with columns: table_name, description, rows, size_bytes, extracted_at, query_mode. Orchestrator ATTACHes it automatically.

Authentication

Auth providers in app/auth/ (FastAPI-based):

• Google: OAuth via Google (Workspace group memberships pulled at sign-in — see docs/auth-groups.md for the GCP setup checklist + the security label gotcha)
• Email: Email magic link (itsdangerous token)
• Desktop: JWT for API

RBAC

See Access control (v13) above and docs/RBAC.md for the full reference. TL;DR for module authors: gate endpoints with Depends(require_admin) for app-level mutations or Depends(require_resource_access(ResourceType.X, "{path}")) for entity-scoped grants. Add a new resource type by extending the ResourceType StrEnum and registering a ResourceTypeSpec (with a list_blocks projection delegate) in app/resource_types.py.

Release & deploy workflows

Two separate release.yml-style workflows produce GHCR images. Pick the one that matches what you're shipping.

release.yml — auto-build on every push

Runs on every push to every branch.

• Push to main → :stable, :stable-YYYY.MM.N (CalVer).
• Push to non-main <prefix>/<branch> → :dev, :dev-YYYY.MM.N, :dev-<branch-slug>, and (when prefix isn't a Git Flow convention) :dev-<prefix>-latest alias.

VMs that pin to a floating tag (:dev, :dev-<prefix>-latest) auto-upgrade within ~5 min via the cron in agnes-auto-upgrade.sh. Convenient for per-developer dev VMs; footgun for shared dev VMs (last pusher wins, regardless of who).

keboola-deploy.yml — tag-triggered, explicit deploy only

Runs only on git tags matching keboola-deploy-*. Publishes:

• :keboola-deploy-<git-tag-suffix> — immutable, tied to the exact commit
• :keboola-deploy-latest — floating alias the consumer pins to

Operator workflow:

git checkout <commit-or-branch>
git tag keboola-deploy-<descriptive-name>
git push origin keboola-deploy-<descriptive-name>
# → workflow builds + publishes both tags
# → VM cron picks up :keboola-deploy-latest within ~5 min
# → manual cron trigger (skip the wait): sudo /usr/local/bin/agnes-auto-upgrade.sh on the VM

Use this when the consumer (e.g. a customer dev VM) needs deploy-when-I-decide semantics — no surprise rollouts from upstream branch pushes by other contributors. The infra repo pins image_tag = "keboola-deploy-latest" on the relevant VM.

Module versioning

The customer-instance Terraform module under infra/modules/customer-instance/ is published as infra-vMAJOR.MINOR.PATCH git tags (separate from app CalVer tags). Bump on any module-API change; downstream infra repos pin to the tag in their source = "github.com/keboola/agnes-the-ai-analyst//infra/modules/customer-instance?ref=infra-v1.X.Y".

After merging a module change to main:

git tag infra-vX.Y.Z origin/main
git push origin infra-vX.Y.Z

Replacing a VM after a startup-script change

Module sets lifecycle { ignore_changes = [metadata_startup_script] } on google_compute_instance.vm so normal terraform apply doesn't churn running VMs. To propagate a startup-script update, trigger the consumer's apply workflow manually with the VM resource address — typical workflow_dispatch input is recreate_targets='module.agnes.google_compute_instance.vm["<vm-name>"]'.

Key Implementation Details

DuckDB Schema (src/db.py)

• Schema v27 with auto-migration v1→…→v27 (v5 adds users.active, v6 adds personal_access_tokens, v7 adds personal_access_tokens.last_used_ip, v8/v9 added the legacy internal_roles/role-grants tables, v10 added view_ownership for cross-connector view-name collision detection (issue #81 Group C), v11 added marketplace_registry + marketplace_plugins + user_groups + plugin_access, v12 added users.groups JSON + user_groups.is_system, v13 replaces internal_roles/group_mappings/user_role_grants/plugin_access with user_group_members + resource_grants and drops users.groups JSON, v14 adds FK constraints on user_group_members + resource_grants after orphan cleanup, v15 adds knowledge_items context-engineering columns + contradictions + session_extraction_state, v16 adds verification_evidence, v17 adds knowledge_item_relations, v18 drops stranded non-google memberships from google-managed groups, v19 drops legacy dataset_permissions, access_requests tables and users.role, table_registry.is_public columns — table access is now exclusively per-group via resource_grants(resource_type='table'), v20 adds source_query TEXT to table_registry to back query_mode='materialized' (BigQuery scheduled-query parquet path), v21 adds welcome_template singleton table backing the Agent Setup Prompt admin override (/admin/agent-prompt), v22 reserves the setup_banner table — feature dropped mid-development; table retained for forward compatibility with already-migrated instances, v23 adds claude_md_template singleton table backing the Agent Workspace Prompt admin override (/admin/workspace-prompt), v24 rewrites materialized BQ source_query from DuckDB-flavor bq."ds"."t" to BQ-native `<project>.ds.t` so the new wrapping path accepts them; idempotent + warns when project unconfigured, v25 adds store_entities + user_store_installs + user_plugin_optouts backing the /store and /my-ai-stack pages — the served marketplace is now (admin_granted ∖ opt_outs) ∪ store_installs, v26 unifies Keboola query_mode='local' rows into 'materialized' — the old local mode (DuckDB Keboola extension's COPY through QueryService) is replaced by the new Storage API export-async path which works regardless of project flags; existing local Keboola rows are flipped, NULL source_query means full-table export, v27 adds 7 columns to table_registry for Keboola per-table sync-strategy support: incremental_window_days, max_history_days, incremental_column, where_filters, partition_by, partition_granularity, initial_load_chunk_days. Layered on top of v26: admins can opt specific tables back to query_mode='local' (via the Direct extract Edit-modal radio) to enable the new dispatcher. The pre-existing sync_strategy column (default 'full_refresh') is reused — pre-v27 it was inert catalog metadata; post-v27 the Keboola extractor dispatches off it (full_refresh | incremental | partitioned). All new columns NULL on existing rows; meaningful only when paired with the matching strategy. — see CHANGELOG and docs/RBAC.md)
• table_registry: id, name, source_type, bucket, source_table, query_mode, sync_schedule, etc.
• sync_state, sync_history: track extraction progress
• users, audit_log: account state + audit trail. RBAC lives in user_groups + user_group_members + resource_grants.
• System DB at {DATA_DIR}/state/system.duckdb
• Analytics DB at {DATA_DIR}/analytics/server.duckdb

SyncOrchestrator (src/orchestrator.py)

• rebuild(): scans extracts dir, ATTACHes all, creates master views, updates sync_state
• rebuild_source(name): single source (used after Jira webhooks)
• Thread-safe via _rebuild_lock

Connector Pattern

• Keboola: connectors/keboola/extractor.py uses DuckDB Keboola extension, fallback to client.py
• BigQuery: connectors/bigquery/extractor.py uses DuckDB BQ extension (remote-only, no download)
• Jira: connectors/jira/webhook.py → incremental_transform.py → extract_init.py updates _meta
• connectors/keboola/client.py: legacy Keboola Storage API wrapper (kept as fallback)

Config Loading

1. config/loader.py loads instance.yaml
2. app/instance_config.py exposes get_data_source_type(), get_value()
3. Table config lives in DuckDB table_registry (not markdown files)

Files NOT to modify (stable infrastructure)

• connectors/jira/file_lock.py - Advisory file locking
• connectors/jira/transform.py - Core Jira transform logic
• services/ws_gateway/ - WebSocket notification gateway

Vendor-agnostic OSS — no customer-specific content

This repo is the public OSS distribution. Nothing customer-specific belongs in code, configuration defaults, comments, docs, commit messages, PR titles, or PR bodies. That includes:

• Specific deployments or brands (private VM names, internal product brands, organization names that aren't already public sponsors).
• Cloud project IDs, internal hostnames, runbook paths from a particular install (/opt/<deployment>, <host>.<internal-domain>, prj-<org>-…, internal SA emails).
• Cross-references to private repos (<private-org>/<private-repo>#NN). Describe the integration in generic terms or link to public examples instead.

When you motivate a change, frame it abstractly ("behind a TLS-terminating reverse proxy", "in containerized deploys") rather than naming a specific operator. When you show examples, use placeholders (example.com, <your-host>, <install-dir>). When config has reasonable defaults pulled from one deployment's habits, generalize them or surface them as documented examples — not hard-coded assumptions.

Customer-specific automation, hostnames, and identities live in private infra repos that consume this OSS. The OSS describes capabilities, defaults, and configuration knobs — not how a specific operator wired them up.

Changelog discipline — non-negotiable

Every PR that adds, removes, or changes user-visible behavior MUST update CHANGELOG.md in the same PR. No exceptions, no follow-ups, no "I'll do it after merge". User-visible = anything an operator, end-user, or downstream integrator can observe: CLI flags / output / exit codes, REST endpoints / payloads / status codes, web UI, instance.yaml schema, env vars, extract.duckdb contract, Docker / compose / Caddyfile knobs, default behaviors, breaking changes, security fixes.

How:

• Add a bullet under the topmost ## [Unreleased] heading (create one if missing — it sits above the latest released version).
• Group by ### Added / ### Changed / ### Fixed / ### Removed / ### Internal (Keep-a-Changelog sections).
• Mark breaking changes with **BREAKING** at the start of the bullet — operators grep for that string before bumping the pin.
• Reference the relevant doc/runbook if one exists (e.g. see docs/auth-groups.md), don't restate it.
• Internal-only changes (refactors, test additions, dependency bumps without behavior change) go under ### Internal — still log them, just keep them terse.

When you cut a release:

• Rename ## [Unreleased] → ## [X.Y.Z] — YYYY-MM-DD.
• Append a new empty ## [Unreleased] section at the top so the next PR has somewhere to land.
• Bump version in pyproject.toml to match X.Y.Z.
• Tag the merge commit as vX.Y.Z and push the tag.

If you find yourself opening a PR without a CHANGELOG entry, stop and add one before requesting review. Reviewers should bounce PRs that touch user-visible behavior without a changelog update — same way they'd bounce a PR with no test changes for new logic.

Git Commits & Pull Requests

• Keep commit messages clean and concise
• Do not include AI attribution in commits or PRs
• Before opening a PR, scan the diff and the PR body for the customer-specific tokens listed above (grep -niE '<token1>|<token2>|...'). If anything matches, generalize or remove it.