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DottaandClaude Opus 5.5
a9ac2e2039
## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work. > - When a person messages an agent, the agent must start its turn fast. Time to first token (TTFT) and agent boot are first-class metrics. > - The Phase 0 baseline (#19846) found that local runner startup costs 1.6–17 s at p50 and up to 50 s at p95. It is the largest part of TTFT. > - The run log records that startup as one span (`runner.session.bootstrap` or `runner.session.resume`). We cannot see if the time goes to staging, to the `paperclip-runnerd` process launch, or to the provider session load. > - This pull request splits local runner startup into three sub-spans in the run log. > - The benefit: the follow-up work to cut follow-up-turn TTFT can measure each step before and after. ## Linked Issues or Issue Description Refs #19846 (TTFT baseline, finding 1 and gap "No sub-spans exist inside local runner startup"). Refs #19838. **What existing behavior does this improve?** The run-log performance spans for local native runner startup. **Current behavior** The local path records one `runner.session.bootstrap` or `runner.session.resume` span that covers runtime staging, the runner process launch and the provider handshake together. The remote path already records `runner.runtime.stage` and `runner.process.launch`; the local path does not. **Proposed behavior** The local path records three sequential child spans of `runner.session.startup`: `runner.runtime.stage`, `runner.process.launch` and `provider.session.load`. **Reason and benefit** The TTFT work needs to know which step dominates before it changes the runner lifecycle. Without these spans, a change to warm runner reuse cannot show which cost it removes. ## What Changed - `RunnerdCodexTransport` has a new optional `onStartupStep` callback. `#start` and `#resume` time three milestones and call it synchronously. A failing callback never changes startup. A nested startup (exact adoption from `thread/start`) keeps the outer clock. - `runner.runtime.stage`: launch preparation before the runner process exists. - `runner.process.launch`: spawn until runnerd accepts the run (`run.prepare`, or the recovery attachment on resume). An adopted live runner records no launch. This keeps the existing meaning in `summarizeStartupReuse`: a launch span means a fresh runner. - `provider.session.load`: `session.open` (or the recovery probe) until the provider identity is confirmed. - `recordNativeRunnerStartupStep` (`native-run-trace.ts`) records each step as a `run.performance.span` row with `mode` and `target: "local"`. It uses `trace.defer`, so the run-log write never delays `turn.start`. - The native executor passes the callback only for a local target. Remote launchers keep their own spans, so there are no duplicates. - `redaction.ts`: allowlist `runner.process.launch` and `provider.session.load` as native span names. - `doc/run-log-events.md`: new section "Local runner startup sub-steps". Data path (AGENTS.md §5.7): run log only, plus Observability spans when an operator sets an OTLP endpoint. The attributes (`mode`, `target`, `outcome`) are already in the closed span-attribute allowlist. No Telemetry change. ## Verification - `pnpm --filter @paperclipai/paperclip-runner exec vitest run src/live/runnerd-codex-transport-startup-steps.test.ts`: a real runnerd and the fake Codex fixture. Bootstrap and a cold resume each report stage, launch and session load in order, with `ok` outcomes and no overlap. A throwing sink does not change startup. - `cd server && npx vitest run src/services/native-runtime/native-run-trace.test.ts src/__tests__/redaction.test.ts`: the rows have the correct parent, offsets, durations and failed level. A stalled run-log sink does not block the caller. The rows settle before `task.provider_session.measured`. The names survive redaction. - The existing `runnerd-codex-transport*` suites pass (412 tests). Under host load (load average 16–27), the first full run had 7 timing failures in suites that do not set the callback. Each failing file passed when I ran it again alone. `runnerd-codex-transport-settlement` passed 3/3 for the failing case alone. - `tsc --noEmit` passes for `packages/paperclip-runner` and `server`. ## Risks - Low risk. Without `onStartupStep`, the transport behaves as before: the clock is not created and each milestone call is an optional-chain no-op. - More run-log rows: three per local runner startup. - The step boundaries are controller-side observations. `runner.process.launch` includes the runnerd authentication and the `run.prepare` acknowledgement, not only the OS spawn. > For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and discuss it in `#dev` before opening the PR. Feature PRs that overlap with planned core work may need to be redirected — check the roadmap first. See `CONTRIBUTING.md`. ## Model Used - Anthropic Claude Opus 5.5 (`claude-opus-5-5`) in Claude Code, with tool use (shell, file edit, test execution). ## Checklist - [x] I have included a thinking path that traces from project context to this change - [x] I have specified the model used (with version and capability details) - [x] I have checked ROADMAP.md and confirmed this PR does not duplicate planned core work - [x] I have searched GitHub for duplicate or related PRs and linked them above - [x] I have either (a) linked existing issues with `Fixes: #` / `Closes #` / `Refs #` OR (b) described the issue in-PR following the relevant issue template - [x] I have not referenced internal/instance-local Paperclip issues or links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip` URLs) - [x] My branch name describes the change (e.g. `docs/...`, `fix/...`) and contains no internal Paperclip ticket id or instance-derived details - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [x] I have updated relevant documentation to reflect my changes - [x] I have considered and documented any risks above - [ ] All Paperclip CI gates are green - [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>