[eandualem]

Read-only additions so a host's debugger can reconcile the runtime's records into its own index without re-reading whole sessions, and can page past the newest 500 records. When the new parameters are absent, responses are unchanged, apart from one new field: updated_at on each session list item.

Changes

• GET /api/sessions/{id}/messages/{message_id} returns one entry in the display form /messages uses. That includes delivered steering; queued steering returns 404.
• GET /api/sessions?updated_after=<ISO 8601> returns only sessions updated strictly later. Without a timezone the value is read as UTC. Each list item now carries updated_at. Without Postgres, that is the session's last-used time.
• before=<id> keyset paging on GET /api/tasks and GET /api/agents/{id}/messages, by (created_at, id). GET /api/actions pages by id, its existing order. An unknown cursor, or one the caller cannot see, returns 404.
• GET /api/counts?from=&to= (admin only) returns events, tasks, actions, agent messages and conversation messages created in [from, to), for completeness checks. A service that is not running counts 0. Voice calls carry no timestamps yet, so they are not counted.

No schema change. Docs: docs/api.md, docs/access.md.

A follow-up will add updated_at columns, a per-session message change feed and updated_after cursors. Message rows are updated in place after they are created, so an id cursor alone would miss those updates.

Verification

• make check: 2982 passed, 1 skipped (Postgres-only); ruff and format clean. Run from a copy without a local .env.
• Independent review: Codex gpt-6-astra, high effort, separate read-only context, 2 rounds.
  • Round 1: one valid P2. The single-message route missed delivered steering. Fixed in 94a02c1, with a test.
  • Round 2: no findings.
  • Live PostgreSQL behaviour was not exercised locally; CI's database job covers the schema.

Part of #83

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Added an admin-only endpoint to retrieve counts of events, tasks, actions, agent messages, and conversation messages within a specified time range.
  • Added “updated after” filtering for session lists, which now include each session’s last-updated time.
  • Added cursor-based pagination to task, agent-message, and action lists.
  • Added an endpoint to retrieve an individual session message, including delivered steering messages.

• Documentation

  • Clarified that viewing record counts requires the admin role and documented the new filters, pagination options, and counts endpoint.

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🧰 Additional context used

📚 Code guidelines (3)

AGENTS.md — auto-discovered
docs/access.md — auto-discovered
docs/api.md — auto-discovered

📝 Walkthrough

Walkthrough

The API adds session update filtering and message lookup, older-than pagination for task, agent-message, and action lists, and an admin endpoint that counts supported records within a time range.

Changes

Session read operations

Layer / File(s)	Summary
Session update filtering docs/api.md, src/assistant_runtime/app/assistant/_session_persistence.py, src/assistant_runtime/app/assistant/_session_store.py, src/assistant_runtime/app/routes/sessions.py, tests/unit/app/assistant/test_session_store.py, tests/unit/app/routes/test_sessions.py	Session lists include updated_at and accept an optional updated_after cutoff. Timezone-free cutoffs are treated as UTC, and results must be strictly later than the cutoff. In-memory session recency timestamps are initialized and refreshed in UTC.
Session message lookup src/assistant_runtime/app/routes/sessions.py, tests/unit/app/routes/test_sessions.py	A route retrieves indexed messages or delivered steering messages by ID. Queued steering messages and messages that do not match the session return 404.

Cursor pagination

Layer / File(s)

Summary

Older-record pagination docs/api.md, src/assistant_runtime/app/routes/{actions,agents,tasks}.py, src/assistant_runtime/app/tasks/{_store.py,interface.py}, src/assistant_runtime/services/actions/{_store.py,interface.py}, src/assistant_runtime/services/database/repositories/{_actions.py,_tasks.py}, tests/unit/app/routes/{test_actions.py,test_agents.py,test_tasks.py}, tests/unit/app/tasks/test_interface.py, tests/unit/services/database/test_repositories.py

Task, agent-message, and action lists accept before cursors and return older records. Task and message cursors are checked against caller visibility; message cursors are also checked against the requested agent. Listing errors are translated to HTTP errors.

Admin counts

Layer / File(s)

Summary

Admin time-range counts docs/access.md, docs/api.md, src/assistant_runtime/app/event_log/*, src/assistant_runtime/app/routes/{__init__.py,counts.py}, src/assistant_runtime/app/assistant/{_session_persistence.py,_session_store.py}, src/assistant_runtime/app/tasks/{_store.py,interface.py}, src/assistant_runtime/services/actions/{_store.py,interface.py}, src/assistant_runtime/services/database/repositories/{_actions.py,_events.py,_sessions.py,_tasks.py}, tests/unit/app/assistant/test_session_store.py, tests/unit/app/routes/test_counts.py, tests/unit/app/tasks/test_interface.py, tests/unit/services/database/test_repositories.py

The admin-only /counts route returns counts for events, tasks, actions, agent messages, and conversation messages in [from, to). It treats timezone-free bounds as UTC, rejects invalid ranges, and returns zero for unavailable services. Store and repository count methods supply the results.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant APIClient
  participant CountsRoute
  participant EventLogService
  participant TaskService
  participant ActionService
  participant SessionStore
  APIClient->>CountsRoute: Request counts for start and end
  CountsRoute->>EventLogService: count(start, end)
  CountsRoute->>TaskService: count(start, end) and count_messages(start, end)
  CountsRoute->>ActionService: count(start, end)
  CountsRoute->>SessionStore: count_messages(start, end)
  CountsRoute-->>APIClient: Return counts and normalized bounds

Loading

Merge Risk: 🔵 Low · up to 94a02

In-memory pagination can miss records when insertion and creation-time order differ. Align its ordering before merging, or accept this bounded reconciliation risk.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 94a02

The new reads preserve administrator and record-ownership checks. No introduced authorization bypass was established. Remaining uncertainty concerns deployment authentication boundaries, while reconciliation timestamps and counts have documented storage-dependent limitations.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• observed — Authorized administrators can obtain counts across the installation's participating stores and page through historical actions. Ordinary task and agent-message reads remain creator-scoped; session reads remain owner-scoped. The inspected changes do not grant execution, secret-management or infrastructure authority.

Trust Boundaries and Controls

• observed — Production dependencies fail with 503 when the access service is unavailable, translate authentication failures to 401, and reject non-admin principals with 403. The supplied counts authorization test overrides principal establishment, so it supports role rejection rather than production authentication behavior.
• observed — Attacker-supplied task cursors must resolve to caller-visible tasks. Agent-message cursors must additionally belong to the selected agent. Foreign and unknown cursors take the same not-found path, and result queries retain creator filters.
• observed — Trusted-local mode with an empty token treats every reachable caller as the local administrator; header mode accepts identity and roles from configured headers. These trust assumptions predate this PR and require deployment containment. No production misconfiguration was established.

Resilience and Maintainability Implications

• observed — Session lookup touches cached recency before route authorization. Cache reordering already existed at the base; the PR additionally updates the in-memory timestamp exposed as updated_at, including for subsequently denied reads. Listing and counting do not publish ownership or message mutations, and content remains protected by the session check. This is bounded metadata behavior rather than an established content-integrity or isolation failure.

Hardening Proposals

• proposed — Verify effective access mode, token configuration and network/proxy containment when deploying the expanded read API. Separating session lookup from post-authorization recency updates would also prevent denied requests from advancing reconciliation timestamps.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 32.54% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 126 functions across 26 files. (2 skipped…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: read routes and filters that support incremental record reconciliation.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 32.54% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 126 functions across 26 files. (2 skipped: 2 unsupported.)

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @src/assistant_runtime/app/tasks/_store.py:
- Around line 29-32: Update `_older_than` to sort records by `(created_at, id)`
before applying the `before` cursor and limit, matching database pagination
order while preserving the existing behavior when no cursor is provided.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Advanced
• Run ID: 738626f8-8d36-4357-ac2c-6f318e5b956f

📥 Commits

Reviewing files that changed from the base of the PR and between 3f3449f and 94a02c1.

📒 Files selected for processing (28)

• docs/access.md
• docs/api.md
• src/assistant_runtime/app/assistant/_session_persistence.py
• src/assistant_runtime/app/assistant/_session_store.py
• src/assistant_runtime/app/event_log/_store.py
• src/assistant_runtime/app/event_log/interface.py
• src/assistant_runtime/app/routes/__init__.py
• src/assistant_runtime/app/routes/actions.py
• src/assistant_runtime/app/routes/agents.py
• src/assistant_runtime/app/routes/counts.py
• src/assistant_runtime/app/routes/sessions.py
• src/assistant_runtime/app/routes/tasks.py
• src/assistant_runtime/app/tasks/_store.py
• src/assistant_runtime/app/tasks/interface.py
• src/assistant_runtime/services/actions/_store.py
• src/assistant_runtime/services/actions/interface.py
• src/assistant_runtime/services/database/repositories/_actions.py
• src/assistant_runtime/services/database/repositories/_events.py
• src/assistant_runtime/services/database/repositories/_sessions.py
• src/assistant_runtime/services/database/repositories/_tasks.py
• tests/unit/app/assistant/test_session_store.py
• tests/unit/app/routes/test_actions.py
• tests/unit/app/routes/test_agents.py
• tests/unit/app/routes/test_counts.py
• tests/unit/app/routes/test_sessions.py
• tests/unit/app/routes/test_tasks.py
• tests/unit/app/tasks/test_interface.py
• tests/unit/services/database/test_repositories.py

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