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feat(linear): own AgentActivity reconciliation - #285

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khaliqgant merged 7 commits into
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feat/linear-activity-reconciliation
Sep 28, 2026
Merged

khaliqgant merged 7 commits into
mainfrom
feat/linear-activity-reconciliation

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@khaliqgant khaliqgant commented Sep 28, 2026 •

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Summary

  • add provider-owned AgentActivity history reconciliation with cursor pagination
  • compare frozen Linear activity content exactly and fail closed on provider/cursor errors
  • export the helper through the Linear writeback boundary for Cloud terminal-writeback dedupe

Validation

  • npm test -w @relayfile/adapter-linear (176 passed)
  • npm run typecheck -w @relayfile/adapter-linear
  • npm run build -w @relayfile/adapter-linear

Follow-up: AgentWorkforce/cloud#4017 will consume the published adapter export.


Note

Medium Risk
New writeback reconciliation path affects agent session terminal activities; incorrect matching or overly strict validation could duplicate or block legitimate activities, though the design fails closed on ambiguous provider data.

Overview
Adds reconcileLinearAgentActivity to @relayfile/adapter-linear so callers can confirm whether a terminal AgentActivity already landed after an ambiguous create, instead of posting duplicates.

The adapter owns the list_agent_activities GraphQL contract (RelayfileAgentSessionActivities), cursor pagination with repeat-cursor detection, strict parsing of session history, and exact matching of frozen activity content (type, body, and action fields) for nodes at or after a caller-supplied time boundary. Provider errors, malformed envelopes, incomplete nodes, and invalid cursors fail closed with errors; a clean scan returns { found: false } or { found: true, externalId }.

The helper and types are re-exported from the package entry and writeback boundary; LinearWritebackRequest gains the new action. Changelog documents the capability for Cloud terminal-writeback dedupe (follow-up consumer PR).

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@codex review

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📝 Code Review ✅ Completed 2026-09-28T10:50:00.559511Z 7ffa783 Manual request
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Reviewing files that changed from the base of the PR and between a0edaa5 and 7ffa783.

📒 Files selected for processing (2)
  • packages/linear/src/agent-activity-reconciliation.test.ts
  • packages/linear/src/agent-activity-reconciliation.ts
📝 Walkthrough

Walkthrough

The Linear adapter adds a reconciliation function that paginates session activities, matches mapped activity content, and returns a matching activity ID. It also adds a request action, public exports, and tests for pagination and error cases.

Changes

Linear AgentActivity Reconciliation

Layer / File(s) Summary
Paginated activity matching and public API
packages/linear/src/agent-activity-reconciliation.ts, packages/linear/src/agent-activity-reconciliation.test.ts, packages/linear/src/types.ts, packages/linear/src/index.ts, packages/linear/src/writeback.ts, CHANGELOG.md
The adapter queries activity pages and compares mapped content fields. It returns a matching ID or found: false, and throws on request errors or missing or repeated cursors. Tests cover pagination, matching, and rejection cases. The request action and public exports are added. The changelog describes the reconciliation responsibility.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant Caller
  participant Reconciler as reconcileLinearAgentActivity
  participant Executor as LinearAgentActivityRequestExecutor
  participant Linear as Linear GraphQL
  Caller->>Reconciler: sessionId and activity
  loop Each activity page
    Reconciler->>Executor: list_agent_activities request
    Executor->>Linear: POST /graphql with cursor
    Linear-->>Executor: Activity page or GraphQL errors
    Executor-->>Reconciler: Proxy response
  end
  Reconciler-->>Caller: Match result or error
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🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 16.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 5 files. (1 skipped: 1… Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly and concisely identifies the main change: Linear-owned AgentActivity reconciliation.
Description check ✅ Passed The description directly explains the reconciliation behavior, error handling, exports, validation results, and intended Cloud integration.
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 16.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 5 files. (1 skipped: 1 unsupported.)

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Devin Review found 2 potential issues.

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Comment thread packages/linear/src/agent-activity-reconciliation.ts Outdated
Comment thread packages/linear/src/agent-activity-reconciliation.ts Outdated

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Comment thread packages/linear/src/agent-activity-reconciliation.ts Outdated

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Actionable comments posted: 1


  • 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @packages/linear/src/agent-activity-reconciliation.ts:
- Line 122: Validate the `execute` response envelope and required session,
`activities.nodes`, and page information in the history-reconciliation flow
before scanning activities or returning a result. Do not convert missing
`activities.nodes` into an empty list that can produce `found: false`; reject
incomplete history responses instead.

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📒 Files selected for processing (6)
  • CHANGELOG.md
  • packages/linear/src/agent-activity-reconciliation.test.ts
  • packages/linear/src/agent-activity-reconciliation.ts
  • packages/linear/src/index.ts
  • packages/linear/src/types.ts
  • packages/linear/src/writeback.ts

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Comment thread packages/linear/src/agent-activity-reconciliation.ts Outdated
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Codex Review: Didn't find any major issues. Swish!

Reviewed commit: 41c0e2aec4

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Comment thread packages/linear/src/agent-activity-reconciliation.ts
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Codex Review: Didn't find any major issues. Bravo.

Reviewed commit: 7ffa783c66

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@khaliqgant
khaliqgant merged commit 8162db4 into main Sep 28, 2026
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khaliqgant deleted the feat/linear-activity-reconciliation branch September 28, 2026 10:49

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Comment on lines +189 to +191
if (
createdAt >= createdAtOrAfter &&
contentMatches(content, input.activity)

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P1 Badge Avoid comparing timestamps from different clocks

When createdAtOrAfter is captured by the consumer before its first write attempt, it comes from the consumer's clock, while createdAt comes from Linear's clock. If Linear's clock is even slightly behind, an activity that actually landed can have createdAt < createdAtOrAfter; this comparison then ignores it and eventually returns found: false, causing the caller to retry and create the duplicate this helper is intended to prevent. Fresh evidence after 7ffa783c is that the new boundary is compared directly with zero skew tolerance; use a provider-derived cursor/known-ID boundary or otherwise account for cross-system clock skew.

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