Files
deepseek-harness/.agents/notes/proposed/process/2026-07-26-pnpm-action-setup-for-symmetric-ci-caching.md
T
Tianyi Cui 3a88912a22 docs: adopt dependencies-over-hand-rolling policy from NIH audit
A repo-wide Not Invented Here audit (ten parallel domain surveys covering
every package group, scripts/, native/, vendor/ edges, python/, test
infrastructure, and CI) asked of each hand-rolled surface whether a
maintained external package or Node builtin deletes it with a net win.

Policy: new implemented process note records that a dependency which
genuinely deletes owned code is a preferred simplification (bar: net
deletion, health, boundary fit, settled seams stay); root AGENTS.md
carries the one-line rule and dsh-find-simplifications now surveys for
hand-rolled-where-a-dependency-exists candidates.

Findings, all bilingual from birth:
- proposed/simplification: eventsource-parser for llm-deepseek SSE,
  node:timers/promises for three hand-rolled sleeps, turndown (or
  minimal 'entities') for tool-web HTML->markdown, gate-script
  consolidation onto mdast/parseArgs/globSync
- proposed/testing: execa + parseArgs + loadEnvFile + vi.waitFor for
  hand-rolled test subprocess plumbing
- proposed/process: pnpm/action-setup for symmetric CI caching
- proposed/feature: evaluate landstrip before building a Windows
  sandbox launcher
- rejected/simplification: ~30 swap verdicts recorded (vscode-jsonrpc,
  p-retry, Ajv, write-file-atomic, msw, hono, better-sqlite3, wireit,
  landstrip-for-linux, YAML consolidation, ...) so the survey is not
  re-litigated from scratch

Also drops the stale prompt/ entry from the AGENTS.md layout map
(workspace instructions live in packages/context/workspace-context).
2026-07-26 15:54:36 +08:00

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# Agent Note: Use pnpm/action-setup for symmetric CI pnpm caching
Status: proposed
English | [中文](2026-07-26-pnpm-action-setup-for-symmetric-ci-caching.zh.md)
## Problem
Five workflows repeat a hand-rolled three-step pnpm setup — `corepack enable`, `pnpm store path --silent >> $GITHUB_OUTPUT`, then `actions/cache@v4` keyed on `pnpm-lock.yaml`: `e2e.yml`, `docs-pages.yml`, `pi-ai-provider-e2e.yml`, `build-exe-for-python-sdk.yml`, and the node-compat, serial-linux, and benchmark jobs of `ci.yml` (~40–60 YAML lines total). The maintained equivalent — `pnpm/action-setup@v4` (reads `packageManager` from package.json) plus `actions/setup-node` with `cache: pnpm` — is already proven in-repo in `landlock-run.yml`, and also insulates against corepack's removal from newer Node distributions.
## Proposal
Convert the symmetric-cache workflows to `pnpm/action-setup@v4` + `setup-node` `cache: pnpm`. Explicitly do NOT convert:
- the three enterprise-runner PR jobs in `ci.yml` — they deliberately use `actions/cache/restore` only, keeping cache compression/upload off the paid latency-critical path, an asymmetry `setup-node`'s cache cannot express;
- the Windows job, which deliberately skips the store cache.
## Alternatives considered
- **Keep the hand-rolled steps.** They work, but they are five drifting copies of setup boilerplate, and the corepack dependency is a known future break.
- **Convert everything including the enterprise jobs.** Rejected: the restore-only asymmetry is a documented latency decision in `ci.yml`'s comments; erasing it to unify tooling inverts the priority.
## Acceptance criteria
- The five symmetric workflows set up pnpm via the actions; one cold run per lane repopulates the new cache-key format, after which cache hit rates match the old steps.
- The enterprise-runner PR jobs and the Windows job are untouched.
## Risks
- Cache-key format changes once (one cold run per lane).
- A third-party action in more workflows; it is already trusted in-repo (`landlock-run.yml`) and is the pnpm team's official action.