Downstream feature: refresh fork retirement ledger (2026-09-15)

[joeshull]

Downstream feature: true
Downstream rationale: docs/fork-retirement.md is the fork-only capability retirement ledger; the path has no upstream counterpart and is outside the governance allowlist, so it must live on internal/main as fork-only work.

Rebuilds the fork retirement ledger from current code and live refs (rebuild, not carry-over). Rebased onto internal/main d503d8498 after the downstream sync landed mid-review; baseline reflects the post-merge state.

• Replaces the stale "LaTeX assistant-message rendering" active section with the plugin assistant-markdown surface (waiting; upstream candidates feat(app): provide SvgXml to plugins getpaseo/paseo#4749 → feat(app): let plugins extend assistant markdown rendering getpaseo/paseo#4750 → feat(app): provide MarkdownSource to plugins getpaseo/paseo#4752, all open; upstream main verified to lack addMarkdownExtension, a plugin-facing MarkdownSource host component, and host-provided SvgXml). Host KaTeX moves to retired history as superseded by fix(app): retire fork KaTeX assistant math hack #110 — not an active capability and not to be restored.
• Refreshes OMP task/subagent lifecycle (waiting): fix(omp): keep parent non-idle while internal task subagents run getpaseo/paseo#3371 still closed unmerged; upstream main at d8dd189b94548bfac12bc20ee1e9caf722d5d54c still completes turns from provider state alone with no silence/elapsed budget and no child-activity awareness (re-verified 2026-09-15).
• Refreshes OMP Ask option descriptions (waiting): fix(omp): preserve described select options getpaseo/paseo#3628 rebased to cd641993c on 2026-09-14 but still open; upstream main still has zero optionDetails handling.
• Refreshes Claude background/autonomous subagent lifecycle (waiting): fix(server): keep background subagents alive when prompting a busy agent getpaseo/paseo#3366 still closed unmerged; claude: spare background subagents from an interrupt, and let one be stopped getpaseo/paseo#4594/fix(server): forward steerActiveTurn through wrapSessionProvider getpaseo/paseo#4633 open without the missing behaviors; upstream main still appends task notifications without settling leftover autonomous turns and still replaces the turn on follow-up admission (re-verified 2026-09-15).
• Evidence baseline moved to internal/main d503d8498 (post-sync), fork mirror b21c004ff, upstream d8dd189b9; review period covers fork merges feat(app): provide SvgXml to plugins #108–fix(app): host native MarkdownSource in View #116 (capability 1 build-out), fix(nix): refresh npm deps hash for markdown plugin lockfile changes #112 (excluded op), docs(development): record the systemd-unit failure mode for local daemon upgrades #113/docs: replace host LaTeX with the plugin markdown surface #117–docs: refresh weekly fork retirement evidence (2026-09-14) #121 (docs/sync).
• No capability reclassified this run; all four remain waiting.

Weekly resolver report

• Active waiting capability count: 4 (plugin assistant-markdown surface; OMP task/subagent lifecycle correctness; OMP Ask option descriptions; Claude background/autonomous subagent lifecycle correctness).
• Status changes: host KaTeX ledger entry replaced by the plugin assistant-markdown surface and moved to retired history as superseded (fix(app): retire fork KaTeX assistant math hack #110); the other three capabilities re-verified waiting against upstream main d8dd189b9 and current PR states — no reclassification.
• Upstream replacements adopted: none this run (all four capabilities remain unmet upstream). In the sync, upstream's new promotion pipeline (agent-stream/presentation.ts, fix(plugins): transform whole timeline items before grouping and Markdown splitting getpaseo/paseo#4675) and cursor-based provider-subagent timelines (fix(agents): prevent OOM from cumulative tool history getpaseo/paseo#4838) superseded the fork's stream-layer block promotion and its serverId threading, which were removed; the plugin render surface (host SvgXml, addMarkdownExtension, MarkdownSource, per-host splitting/heights) is preserved.
• Fork implementations removed: only the code upstream had fully replaced (stream-layer promotion + its serverId threading, in the Downstream sync: merge live main into internal/main #123 sync). No capability code removed.
• Sync PRs found/resolved/skipped: found Sync upstream main into internal/main #122 (conflicting main→internal/main); resolved by Downstream sync: merge live main into internal/main #123; merged 2026-09-13Z… see below; no existing resolver found, none skipped.
• PRs: sync resolution Downstream sync: merge live main into internal/main #123 — merged as d503d8498 on 2026-09-15 (head merge commit 54c0520bf, two-parent: first parent 1ce7e4508, second parent live main b21c004ff); the auto-PR Sync upstream main into internal/main #122 merged automatically 2s later. Ledger refresh this PR, head efa39d312.
• Focused verification and CI: for Downstream sync: merge live main into internal/main #123 — 369 focused vitest tests across conflicted behaviors, plugin surface, and agent-stream all green; typecheck clean; oxlint clean on all touched files; format check clean; PR CI all 20 checks green; merged by the Upstream import merge workflow. For this PR — docs-only; pre-commit format and typecheck pass; CI (changes/format/reconcile) green for the head. No blockers.

[joeshull]

Focused governance review of efa39d312 (Downstream feature, docs-only).

Verdict: PASS. No high-risk findings. No advisory findings. Confidence 0.99.

• Body has exactly one Downstream feature: true line, one non-empty Downstream rationale: line, no conflicting mode or upstream-provenance markers, and ## Weekly resolver report as the final section citing the reviewed head. Diff limited to docs/fork-retirement.md; single-parent commit on base d503d8498; MERGEABLE.
• Refs resolved: origin/internal/main=d503d8498, origin/main=b21c004ff, upstream/main=d8dd189b94548bfac12bc20ee1e9caf722d5d54c. Upstream PR states confirmed: feat(app): provide SvgXml to plugins getpaseo/paseo#4749/feat(app): let plugins extend assistant markdown rendering getpaseo/paseo#4750/feat(app): provide MarkdownSource to plugins getpaseo/paseo#4752/fix(omp): preserve described select options getpaseo/paseo#3628 open (fix(omp): preserve described select options getpaseo/paseo#3628 head cd641993c), fix(omp): keep parent non-idle while internal task subagents run getpaseo/paseo#3371/fix(server): keep background subagents alive when prompting a busy agent getpaseo/paseo#3366 closed unmerged. git grep on upstream main: zero addMarkdownExtension/optionDetails; completeTurnAfterProviderIdle and appendTaskNotificationEvents present; no plugin-facing SvgXml/MarkdownSource.
• Fork PR attribution verified by GitHub commit membership and ancestry: feat(app): provide SvgXml to plugins #108=d1a1008eb (SvgXml), feat(app): let plugins extend assistant markdown rendering #109=945b75f80/8af9d6b5b/2d28c1b94 (extension API/delimiters/plumbing), feat(app): provide MarkdownSource to plugins #111=b2709ad71/d09b67558/275b9e863 (MarkdownSource), fix(app): retire fork KaTeX assistant math hack #110=0e15bccdc (KaTeX retirement); fix(app): isolate markdown parser rebuild after a failed install #115/fix(app): host native MarkdownSource in View #116 merge SHAs are ancestors of origin/internal/main. Host KaTeX files absent from the integration and recorded only as superseded retired history; four waiting capabilities counted.
• npx oxfmt --check docs/fork-retirement.md passes on the exact head; current changes, format, merge, and reconcile checks green.