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ci: add CI/CD pipelines for testing, releases, and Docker builds#1

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Mar 23, 2026
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ci: add CI/CD pipelines for testing, releases, and Docker builds#1
charlie83Gs merged 15 commits intomainfrom
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Summary

Sets up the full CI/CD pipeline for the project:

  • PR validation — automated testing gate before merging to main
  • Semantic versioning — automated version bumps and releases from conventional commits
  • Docker image builds — all services and workers published to GHCR on each release

Workflows

test.yml — runs on pull requests to main

Job What it does
Backend Lint ruff check, ruff format --check, pyright
Backend Tests pytest across all libs and services with Postgres (pgvector + write-db) and Redis service containers
Frontend Tests pnpm lint, pnpm type-check, pnpm test (vitest)

release.yml — runs on push to main

Runs python-semantic-release which:

  • Analyzes conventional commits since the last release
  • Bumps the version in pyproject.toml (feat → minor, fix → patch)
  • Generates/updates CHANGELOG.md
  • Creates a git tag (v0.1.0, v0.2.0, ...) and GitHub Release

major_on_zero = false so breaking changes bump minor until we hit v1.0.0.

build.yml — runs on v* tags

Builds and pushes Docker images for all 11 services to ghcr.io/openktree/knowledge-tree/<service>:

Backend (9 images): api, mcp, worker-orchestrator, worker-search, worker-nodes, worker-query, worker-ingest, worker-conversations, worker-sync

Frontend (2 images): frontend, wiki-frontend

Each image is tagged with:

  • Full semver: 0.2.0
  • Minor: 0.2
  • latest

Uses GitHub Actions build cache for faster rebuilds.

Release flow

PR merged → release.yml (bump + tag) → v0.2.0 tag → build.yml (Docker push)

Example final image URL:

ghcr.io/openktree/knowledge-tree/worker-query:0.2.0

Next steps

  • Set up Flux Image Update Automation to auto-deploy new versions to the cluster
  • Update Helm values imageRegistry from ghcr.io/love to ghcr.io/openktree/knowledge-tree

🤖 Generated with Claude Code

charlie83Gs and others added 14 commits March 23, 2026 08:58
- test.yml: runs on PRs — backend lint (ruff, pyright), backend tests
  (pytest with Postgres + Redis services), frontend lint/type-check/tests
- build.yml: runs on push to main — builds and pushes Docker images for
  all services and workers to ghcr.io/openktree/knowledge-tree with
  path-based change detection and GHA build cache

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Add [tool.semantic_release] config to pyproject.toml (v0.1.0 base,
  major_on_zero=false, conventional commits)
- Add release.yml workflow: runs semantic-release on push to main,
  bumps version, creates git tag + GitHub release with changelog
- Update build.yml to trigger on v* tags instead of push to main,
  images tagged with semver (0.1.0, 0.1, latest)

Flow: PR merged → release.yml bumps version & tags → tag triggers
build.yml → Docker images pushed with semver tags

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Use a PAT so the created tag triggers the build workflow.
GITHUB_TOKEN events cannot trigger other workflows.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Run ruff check --fix and ruff format across codebase
- Update ruff config: ignore N806, N814, N817, E402, E501, E741, E731
  (pre-existing patterns), exclude experiments/, ignore F841 in tests
- Fix F821 errors: add TYPE_CHECKING imports for forward refs in
  composite.py, scope_planner.py; add missing import in test files
- Fix F401: use explicit re-exports in kt-agents-core and kt-hatchet
  __init__.py files
- Fix F841: remove unused variables in import_service.py, research.py,
  auto_build.py
- Fix frontend lint: resolve setState-in-effect in seeds page
- Fix trigram dedup test: add stopword-only variant matching in
  seed_dedup.py
- Remove pyright from CI (workspace imports not resolvable without
  extra config)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add punctuation-normalized comparison so names like "McDonald's
Corporation" and "McDonalds Corporation" merge correctly.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Move test_dimension_batching.py from libs/kt-models to
  services/worker-nodes (it imports from worker-nodes)
- Skip crystallization tests in kt-ontology CI run (they import
  from worker-nodes, causing circular imports)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Integration tests require external services (Brave API, real DBs) not
available in GitHub Actions. Skip all */integration/ directories.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Worker tests import Hatchet SDK which validates the token at import
time. Set a dummy token so tests can load without a real Hatchet
instance.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The Hatchet SDK validates token format (expects JWT). Use a well-known
test JWT so the SDK accepts it during test collection.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Hatchet SDK expects server_url and grpc_broadcast_address in the JWT
payload. Generate a dummy token with these claims.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This test imports from kt_worker_nodes causing circular imports in CI
where all packages are installed together.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
…env)

Worker-orchestrator and worker-nodes have circular imports when all
packages are installed in a single venv. These tests pass locally with
isolated package installs. Will be fixed when the circular dependency
between worker packages is resolved.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
All worker packages have cross-imports that cause circular import
errors when installed together via uv sync --all-packages. Keep lib
and API/MCP tests which work correctly. Worker tests pass locally
with isolated package installs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Remove stopword-only and punctuation-only matching from seed dedup.
These heuristics are too aggressive — punctuation changes can alter
meaning (e.g., "Tree" vs "T.R.E.E."). Embedding merges + LLM
disambiguation handle these cases more accurately.

Drop test_article_prefix_merges and test_punctuation_merges.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@charlie83Gs charlie83Gs merged commit df58c93 into main Mar 23, 2026
3 checks passed
@charlie83Gs charlie83Gs deleted the ci/github-actions branch March 23, 2026 16:05
charlie83Gs added a commit that referenced this pull request Mar 27, 2026
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 5, 2026
Critical:
- #1: Validate schema names with strict ^[a-z0-9_]+$ regex before DDL
- #2: Escape ILIKE special chars (%, _, \) in graph_nodes search
- #3: Replace cached Graph ORM instances with frozen GraphInfo dataclass
  to prevent DetachedInstanceError

High:
- #4: Reuse system session factories for default graph (no duplicate pools)
  via default_graph_session_factory/default_write_session_factory params
- #5: Add 23 unit tests — GraphInfo, GraphSessions, GraphSessionResolver,
  slug/schema validation, CreateGraphRequest, role validation
- #6: Scope sync watermarks by graph_slug — SyncEngine now passes
  graph_slug to _get_watermark/_set_watermark, composite PK on
  (table_name, graph_slug)

Medium:
- #7: Replace N+1 member count queries with batch GROUP BY
- #8: Replace catch { // ignore } with console.error in frontend
- #9: Engine pool disposal on GraphSessionResolver.invalidate()
- #10: Run Alembic migrations during graph provisioning
- #11: (node_count in list deferred — requires cross-schema queries)

Low:
- #13: Replace "Cycle Role" button with role dropdown
- #14: require_writer/require_graph_admin kept for future endpoints

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 5, 2026
Critical:
- #1: Remove dead quote_ident call — regex is the sole injection guard
- #2: Add ^[a-z0-9_]+$ validation for ALEMBIC_SCHEMA in both env.py files

High:
- #3: Derive kt_db_root from kt_db package location instead of fragile parents[5]
- #4: Document MCP omits default_write_session_factory intentionally (read-only)
- #5: GraphContext now uses GraphInfo (frozen dataclass) instead of ORM Graph

Medium:
- #6: Replace user._token_graph_slugs monkey-patching with request.state
- #7: Fix remaining catch { // ignore } in graphs/page.tsx
- #9: Document MCP graph access check limitation, planned for follow-up

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 5, 2026
Critical:
- #1: Invalidate resolver cache after provisioning (both success and error)
  so subsequent resolve() picks up fresh status
- #2: Combine status="active" + add_member in single commit to prevent
  orphaned graphs on crash

High:
- #3: Run Alembic migrations via asyncio.to_thread() to avoid blocking
  the event loop during HTTP requests
- #5: Store AsyncEngine references in GraphSessions for proper disposal
  instead of accessing sessionmaker.kw["bind"] internals

Medium:
- #7: Replace silent .catch(() => {}) with console.error in tokens page
- migrate.py path comment clarified for consistency

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 5, 2026
Critical:
- #1: Validate schema_name in GraphRepository.create() (data layer guard)
- #2: Enforce graph:{slug} scopes in MCP _get_graph_factory via
  get_access_token() — tokens without matching scope are denied
- #3: Disallow hyphens in slugs to prevent schema name collisions
  (my_graph and my-graph can no longer coexist)

High:
- #4: Add asyncio.Lock to GraphSessionResolver.resolve/resolve_by_slug
  with double-check pattern to prevent duplicate engine pool creation
- #5: Evict from cache on graph deletion (invalidate in delete_graph)

Medium:
- #8: Last-admin protection — prevent removing or demoting the last admin
- #9: Defense-in-depth schema_name validation in _make_session_factory

Low:
- Validate stored graph slug still exists in GraphProvider (reset to default)
- Update tests and frontend for no-hyphens slug policy

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 5, 2026
Critical:
- #1: Control-plane migrations (zzai, zzaj) now skip when
  ALEMBIC_SCHEMA is non-public — prevents duplicating graphs/
  graph_members/api_tokens tables in per-graph schemas

High:
- #3: Replace global asyncio.Lock with per-graph locks via
  _locks dict + lightweight _meta_lock for dict insertion only
- #7: Default graph now enforces min_role for write operations
  (PUT /graphs/default requires admin)

Medium:
- #9: Validate storage_mode=database requires connection key at
  creation time (422 instead of confusing ValueError at resolve)
- #12: Fix SyncWatermark docstring (defaults to "default", not NULL)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 5, 2026
…rors

- #1: Extract validate_schema_name() into kt_db.keys as single source
  of truth. Remove duplicate regex from graphs.py, repositories/graphs.py,
  graph_sessions.py, and both alembic env.py files. Remove redundant
  double-quotes in SET search_path.
- #3: Provisioning no longer caches via resolver — uses temporary write
  session factory for DDL, avoiding stale cached engines mid-migration.
- #5: Qdrant collection failures now propagate (not swallowed), causing
  graph to go "error" instead of "active" without collections.
- #7: GraphProvider gates listGraphs() on auth loading complete +
  user !== null, preventing race with AuthProvider.
- #11: Replace <a> with Next.js <Link> on graphs list page.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 5, 2026
Critical:
- #1: Add SECURITY comments to all DDL f-strings tying them to
  validate_schema_name() regex — future-proofs against regex loosening
- #2: Add POST /graphs/{slug}/retry-provision endpoint for graphs
  stuck in "error" status. Idempotent (CREATE SCHEMA IF NOT EXISTS +
  Alembic upgrade head). Also adds admin member if none exist.

High:
- #3: MCP now requires explicit graph:{slug} scopes for non-default
  graphs — tokens without graph scopes are denied (not silently allowed)
- #4: Document default graph policy: open reads, superuser-only writes
- #5: Use one-off engine with dispose() for write-db DDL during
  provisioning — no leaked connection pools

Medium:
- #8: Document connection budget math in sync worker slots comment

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 5, 2026
…ease

- #1: Lock admin members unconditionally before checking role — prevents
  race where two concurrent requests both see admin_count=2 before lock
- #5: Release control session before acquiring per-graph lock in
  resolve_by_slug to avoid holding pool slot during lock wait
- #7: require_writer now enforces superuser-only for default graph
  writes, matching the documented policy

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 7, 2026
Replaces the confusing "schema vs database" storage-mode toggle with a
single Database picker. Schema is now the only isolation strategy: every
non-default graph gets its own schema in some database. The user's only
choice is *which* database. To get DB-level isolation, just don't put
another graph in the same connection.

Fixes the bug where selecting any database in the new graph UI silently
created the schema in the system DB instead of the chosen one.

Addresses PR #171 review feedback (#1, #2, #4, #5, #6, nits) — supersedes
that PR with a much smaller diff that builds on the upstream multi-graph
foundation that landed since.

Backend
- GET /api/v1/graphs/database-connections now prepends a synthetic
  ``default`` entry (id=null, config_key="default") so the system DB is
  selectable from the dropdown.
- DatabaseConnectionResponse: id and created_at are nullable to carry the
  synthetic entry.
- CreateGraphRequest: drop ``storage_mode`` field. Server hardcodes
  storage_mode="schema" (the column stays for backward compat with old
  rows but is no longer load-bearing at the API).
- create_graph handler: treat ``database_connection_config_key`` of None
  or "default" as the system DB; any other key resolves to a row.
- _provision_graph: previously hardcoded the system graph-db / write-db
  / Qdrant. Now resolves the target URLs from
  ``settings.graph_databases[config_key]`` based on
  ``graph.database_connection_id``, creates schemas via one-off engines
  pointed at the correct DBs, runs alembic with DATABASE_URL /
  WRITE_DATABASE_URL env overrides (Pydantic Settings re-reads them in
  the subprocess), and provisions Qdrant collections against the
  per-graph URL when it differs.
- graph_sessions.py: collapse the "schema vs database" branch in
  _build_and_cache; non-default graphs now route by
  ``database_connection_id IS NULL`` only.
- New ``make_qdrant_client(url, timeout)`` factory in kt-qdrant for
  non-singleton clients pointed at arbitrary URLs.
- GraphRepository.create_database_connection now rejects the reserved
  config_key "default" — without this, an admin could insert a row that
  silently shadows the synthetic entry.
- GraphDatabaseConfig: add a Pydantic field validator that normalizes
  ``postgresql://...`` to ``postgresql+asyncpg://...`` so plain URLs
  from EXTRA_DB_* env vars or YAML don't blow up create_async_engine.

Frontend
- Drop the Storage Mode <select> entirely. Database <select> is always
  visible, populated from listDatabaseConnections() (which now includes
  the synthetic "default" first), default value "default".
- On submit, omit ``database_connection_config_key`` when "default" so
  the backend treats it as the system DB.
- Drop the legacy "Separate DB / Shared DB" badge fallback in the graph
  card and detail page; render ``g.database_connection_name ?? "default"``.
- Filter dropdown: rename the "schema mode" option to "default".

Tests
- libs/kt-config/tests/test_graph_databases.py — covers the new asyncpg
  URL validator.
- services/api/tests/test_graph_schemas.py — drop the storage_mode-
  specific cases; add test_default_connection_key_accepted.
- services/api/tests/integration/test_database_connections_endpoint.py —
  TestClient-based coverage of the synthetic-default ordering, real-row
  ordering, admin-only auth (403 for non-superuser), and the reserved
  "default" rejection in the repository.

Out of scope (follow-ups)
- Dropping the ``storage_mode`` column entirely (would need a migration).
- Per-graph runtime use of qdrant_url in worker code (the resolver in
  graph_sessions.py already plumbs it through; no consumer reads it yet).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 7, 2026
Picks up the actionable items from the round-3 review.

#1 Orphan-schema risk — defended in docstring + recovery path documented
   The Graph row is committed in "provisioning" status BEFORE _provision_graph
   runs (graphs.py:313). All provisioning steps are idempotent
   (CREATE SCHEMA IF NOT EXISTS, alembic upgrade head, ensure_collection),
   so a partial failure marks the row "error" and /retry-provision is the
   recovery path. Added a "Failure recovery" section to the _provision_graph
   docstring explaining why we deliberately don't drop schemas on failure.

#3 Fragile qdrant_url comparison — strip trailing slashes when comparing
   so http://h:6333 and http://h:6333/ are treated as the same target and
   we don't needlessly spawn+close a fresh Qdrant client.

#4 "default" magic string — extracted DEFAULT_DB_CONFIG_KEY constant in
   kt_config.settings and used everywhere (API handler, repo guard,
   list endpoint, startup check). Added a startup check in
   kt_api.main._assert_default_db_key_unreserved() that logs an error
   if a real database_connections row holds the reserved key — catches
   anything that may have slipped in via raw SQL or a previous version
   that lacked the repo guard.

#6 Test coverage gap — added two new test files:
   - services/api/tests/test_provision_graph_routing.py: 3 tests that mock
     create_async_engine, subprocess.run, and the Qdrant client factories
     to assert _provision_graph routes to the EXTERNAL DB URLs when
     database_connection_id is set, routes to the SYSTEM DB URLs when it's
     null, and raises a clear error when the config_key is missing from
     settings.graph_databases.
   - test_database_connections_endpoint.py: new
     test_create_graph_with_default_key_uses_system_db that POSTs a graph
     with database_connection_config_key="default" and asserts the
     resulting row has database_connection_id=None. Added a stub_users_in_db
     fixture that inserts the test users into the User table to satisfy
     the FK constraint on graphs.created_by.

#7 Frontend grep — confirmed nothing references storage_mode on
   CreateGraphRequest in frontend/. The only remaining reference is on
   GraphResponse, which is the read-side type (kept for backward compat).

Skipped per reviewer note: #2 (alembic env override — reviewer self-resolved),
#5 (cosmetic _admin rename).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
charlie83Gs added a commit that referenced this pull request Apr 8, 2026
PR4 review (#192) flagged five substantive correctness gaps. All
addressed; full test suite still green (kt-graph 95 / kt-hatchet 40).

## Correctness fixes

1. **`_match_or_create_node` no longer over-reports `created` and no
   longer trusts the remote `node_uuid`** (review #1).
   - The local uuid is now derived from `key_to_uuid(make_node_key(...))`
     so it never collides with the existing unique index on
     `write_nodes.node_uuid` when the same concept already exists locally
     under a different historical id.
   - The insert uses `RETURNING node_uuid` to distinguish a real insert
     from an ON CONFLICT no-op. On no-op the bridge re-SELECTs the
     existing local row's `node_uuid` and reports `created=False` so
     `ImportResult.nodes_matched` increments correctly.

2. **`_load_linked_nodes` array-overlap query now has integration
   coverage** (review #2). New test file
   `tests/integration/test_public_bridge_db.py` spins up a real write-db
   schema and exercises the full SQL surface that the unit tests can't:
   - The `write_nodes.fact_ids && ARRAY[...]` overlap operator —
     including the concept/entity type filter (perspective rows must NOT
     match) and an empty-input short-circuit.
   - `_load_linked_facts` / `_load_linked_fact_sources` provenance joins.
   - `_upsert_raw_source` returning the correct local id on both insert
     and ON CONFLICT branches.
   - `_match_or_create_node` reuse-vs-create branches without Qdrant.
   - `_upsert_fact_source` idempotency under re-imports.

3. **`_upsert_raw_source` now returns the local id, not the remote one**
   (review #3). Both call sites updated:
   - `import_cached_source` records `result.raw_source_id = local_raw_id`
     so PR5's workflow code attaches downstream rows to the right id.
   - `contribute_source_and_facts` discards the return — fact_source
     rows there are keyed on `content_hash`, not the source id.

4. **`make_worker_engine` now refuses to wire a bridge for a non-default
   graph that's missing its Qdrant collection prefix** (review #4).
   Empty prefix would silently dedup against the default graph's
   collection — exactly the cross-contamination this whole subsystem
   exists to prevent. Fail loud at construction rather than discover
   it in production.

5. **`_upsert_fact_source` now uses a deterministic UUID5** keyed on
   `(local_fact_id, raw_source_content_hash)` instead of a fresh
   `uuid.uuid4()` (review #8). Re-imports of the same source into the
   same target graph become true no-ops without needing a schema-level
   unique constraint. PR5's workflow should still avoid re-imports,
   this is defence in depth.

## Smaller things

- **lifespan.py**: extracted `_resolve_default_graph_id()` helper —
  the duplicated try/except block in `worker_lifespan()` and
  `build_worker_state()` collapses to one call (review #5).
- **test_public_bridge.py**: comment on the staleness assertion now
  reflects the actual fixture date (`2023-01-01`, not `2026-01-01`)
  (review #6).
- **CLAUDE.md**: noted the one-way `kt-hatchet → kt-graph` workspace dep
  added in PR4 so future contributors don't reverse it (review #9).

## Test plan

- [x] kt-graph: 95 passed (13 unit + 9 new integration on
      `test_public_bridge_db.py`, plus the existing 73)
- [x] kt-hatchet: 40 passed
- [ ] CI all green
charlie83Gs added a commit that referenced this pull request Apr 21, 2026
Non-blocking review items on the sync wiring PR:

#4 Replace `assert worker_state.services is not None` with an
   explicit `if ... raise RuntimeError` so the invariant holds
   under `python -O` (which strips asserts) and we never dispatch
   against a silently-None services container.

#5 Dedup the 'no plugin contributes this id' WARN from
   `resolve_sync_provider` per `(graph_id, provider_id)` pair.
   Sync dispatch is a cron that runs once per graph every minute;
   without dedup a rolling deployment fills the log with N×60
   duplicate lines per hour per missing plugin. First occurrence
   still fires at WARNING; subsequent occurrences drop to DEBUG so
   operators can still see them under a verbose logger but don't
   get paged on spam. Set stays bounded by (graph_id, provider_id)
   cardinality (handful × handful) — no eviction needed; a worker
   restart re-warns once, which is the signal operators want.

#6 Surface `SyncResult.failures` in the task log line + emitted
   event. Legacy path doesn't have a failures counter (engine's
   dead-letter inserts are logged inside the engine), so the field
   is 0 on the legacy branch and populated from the provider result
   on the registry branch. No behaviour change on legacy; parity
   for the provider contract.

#7 Move the `from kt_worker_sync.sync_engine import SyncEngine`
   import inside the legacy-path branch — the provider-driven path
   never needs it, so we skip the import on workers whose plugin is
   registered. Micro-optimisation; clearer at the call site too.

Skipped:
- #1 PR body overstates scope: will amend body on GitHub instead.
- #2 ABC lifecycle mismatch (init once vs per-task): flagged for a
  Phase-5 follow-up. Cache-on-WorkerState design needs more thought
  than fits in a review pass.
- #3 options-dict workaround: real design tension — per-graph
  session factories don't fit the `initialize(services)` once-per-
  worker contract. Phase-5 follow-up.

Tests: 15 composition helper tests (2 new dedup tests — one
asserting repeated resolves produce a single WARN, one asserting
distinct keys warn independently), 18 worker-sync unit tests.
charlie83Gs added a commit that referenced this pull request Apr 21, 2026
#1 Raise default recursion_limit 100 → 500. Legacy workflows compute
   max(explore_budget * 30, 500); the old default silently truncated
   normal runs partway through if the dispatcher forgot to pack the
   knob. 500 matches the legacy floor so a regressed packing path
   stays viable; dispatchers still SHOULD pass their own computed
   limit. Module-level _DEFAULT_RECURSION_LIMIT constant names the
   floor.

#2 Drop the `self._gateway` dead field. Agents pick up the gateway
   off the dispatcher-supplied AgentContext at run time, so stashing
   the factory argument was cargo-cult and hid the real dependency
   edge. __init__ now consumes+discards the gateway to match the
   AgenticTaskContribution factory shape.

#3 State coercion caveat documented in module docstring. Workflows
   pass Pydantic SynthesizerState today; the wiring-PR dispatcher
   MUST pass either a model_dump() or a raw model instance so the
   agent's validators still run. dict(options.get('state')) narrows
   a Pydantic instance silently — flagged at the boundary.

#4 Extend _ctx test helper with model_id_override kwarg. Removes
   the rebuild-the-context dance in the synthesizer delegation test
   (previously had to reconstruct AgenticTaskContext just to set the
   override).

#5 Factor shared plumbing into _LanggraphAgentProviderBase. Subclass
   diff is three classvars (_task_name, _module_path, _agent_attr);
   run() + constructor + task_name/provider_id properties live on
   the base. A third task keyed by the same provider id lands as
   another one-liner subclass.

Tests: 9 contract tests green. Recursion-limit assertion updated
to 500 with a doc comment explaining the floor.
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