fix(server): link thread PRs without an open client

[t3dotgg]

Thread PR links depended on client-side logic. Automatic relinking required an open web chat, and web and mobile could show different associations.

The server now discovers and saves PR links for each thread's branch. All clients read those links. Manual links stay separate, and stale lookups cannot overwrite newer changes. Settlement checks for a newer open PR before acting on a merged link.

Automatic branch links require the updated server. The client fallback is removed.

Focused tests and affected package typechecks pass. Targeted lint reports warnings but no errors.

Created with GPT-6 Astra in Codex.

Note

Add server-side thread PR discovery and remove client-side VCS PR resolution

• The server now discovers and syncs thread PRs through the new ThreadPullRequestReactor and thread.pull-request.sync command, allowing PR links without an open client.
• Web and mobile clients remove local VCS branch PR resolution, relying solely on server-provided linkedPullRequest or branchPullRequest metadata.
• Migration 048_ProjectionThreadBranchPullRequest adds branch_pull_request_json to projection_threads; projection and contract schemas now support branchPullRequest.
• GitManager.branchPullRequest supports an optional refresh flag and derives repository keys for GitHub, GitLab, Bitbucket, and Azure DevOps URLs.
• Risk: thread.pull-request.sync fails with OrchestrationCommandInvariantError if the thread is recreated after the command snapshot. Clients cannot open PRs when no server link exists.

^{Macroscope summarized 6760605.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.6 KiB	13.6 KiB	+18 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	7.0 KiB	7.0 KiB	+12 B (+0.2%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+6 B (+0.1%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.1 KiB	57.1 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.6 KiB	13.6 KiB	−47 B (−0.3%)	15.1 KiB	✅
Claude	Thread snapshot wire	7.0 KiB	7.0 KiB	0 B (0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.6 KiB	6.5 KiB	−47 B (−0.7%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	57.9 KiB	57.8 KiB	−88 B (−0.1%)	66.4 KiB	✅
Claude	Live turn messages	10	8	−2 (−20.0%)	21	✅

Baseline: 5fa35d2 · PR result: 03c0d05 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 113.9 KiB
• Claude decoded thread snapshot: 114.5 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[macroscopeapp]

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This PR introduces an always-on server reactor that discovers and persists branch pull requests, changes automatic settlement behavior, and propagates new state through migrations, orchestration, web, and mobile clients. Its cross-layer runtime impact and default-on background activity require human review.

Not approved because:

• Monthly spending limit reached (workspace setting). Approvability relies on correctness review in order to determine eligibility

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