Files
PaperClipAI/doc/RELEASE-AUTOMATION-SETUP.md
8227485372 perf(ci): cache the Runner's release crate artifacts keyed by their inputs (#15932)
## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work
> - Its trusted PR workflow builds the Runner's Rust binary in five
jobs: Typecheck + Release Registry, Build, Canary Dry Run, and the
`rust` and `vitest 2/2` lanes of Verify Paperclip Runner. The `Build`
job is the slowest check in almost every green run (461s, 489s and 515s
in runs 38180574768, 38182717052 and 38183149920 on 2026-10-11).
> - Each of those jobs restores master's `release-runner-v2` dependency
cache. That cache holds only third-party crates. `rust-cache` removes
workspace crates when it saves, and a fresh checkout invalidates cargo's
mtime fingerprints for workspace crates in any case. So cargo compiles
`paperclip-runner-core` in release mode from scratch on every run. The
job logs show one `Compiling` line and 28s to 49s for it.
> - 18 of the 239 commits on `master` in the seven days before this
change touched the crate's inputs. The other 221 compiled the same
sources to the same binary again.
> - This pull request adds a second cache that holds only that crate's
release artifacts (about 70 MB). The key is made from the compiler, the
checkout root and a hash of every input the build reads. The master Rust
lane writes it. A pull request whose merge tree has byte-identical
inputs restores it and marks the artifacts newer than the checkout, so
cargo keeps them. Every other pull request misses and compiles as
before.
> - The benefit is about 28s to 49s less on `Build`, which is the run's
critical path, and the same on Typecheck, Canary Dry Run and two Runner
lanes, for about nine of ten pull requests.

## Linked Issues or Issue Description

No GitHub issue exists for this. The description below follows the
enhancement template.

**What existing behavior does this improve?**

The time the trusted PR workflow spends to compile the Runner's own
crate on every run.

**Subsystem affected**

CI / build

**Current behavior**

Every PR job that builds the Runner binary compiles
`paperclip-runner-core` in release mode from scratch. The compile takes
28s to 49s on the `runs-on` fleet (one `Compiling paperclip-runner-core`
line, then `Finished release profile` in runs 38169436532 to 38183149920
on 2026-10-11). The shared Rust cache cannot help: it holds only
third-party crates, and a fresh checkout gives every source a new mtime,
which makes cargo discard the crate's fingerprints.

**Proposed behavior**

The master Rust lane in `release-verify.yml` saves the crate's release
artifacts under a key made from the compiler, the checkout root and a
hash of every input the release build reads. The PR jobs that build the
binary restore that entry read-only. On a hit, a script sets the mtime
of every restored artifact to now, so cargo sees every source as older
than the build and keeps the artifacts. `pnpm build` then prints
`Finished release profile` in under a second for that crate. On a miss,
cargo compiles the crate exactly as before.

**Reason and benefit**

About 28s to 49s off `Build`, the slowest check in almost every green
run, and the same off the Typecheck, Canary Dry Run and two Verify
Paperclip Runner lanes. The saving applies to every pull request whose
merge tree does not change the crate's inputs, which was 221 of 239
`master` commits in the week before this change.

**Breaking changes**

None. The checks are unchanged. A miss or an eviction costs the compile
time it costs today and nothing else.

**Additional context**

This is a workflow change. `pr.yml` calls `pr-trusted.yml@master`, so
this pull request's own run uses the current reader steps, and the
writer runs only on a master push. The saving becomes visible on the
first PR runs after the merge and after the next master push has written
the entry.

## What Changed

- `scripts/runner-release-crate-cache.mjs` (new): the one place that
defines the cached path list (`CACHED_PATHS`), the hashed inputs
(`HASHED_INPUTS`) and the files a restore must contain (`REQUIRED`). The
`scope` subcommand prints the platform, the `rustc --version --verbose`
release, commit and host, and a hash of the checkout root. The
`mark-current` subcommand sets the mtime of every restored artifact to
now and prints a `paperclip.runner-release-crate.v1` JSON line with the
file count and bytes. If the restored set lacks any of the seven files
cargo's freshness check reads or checks for (the fingerprint hash and
dep-info of each unit, the lib's rlib and rmeta, the binary under
`deps`), it removes the restored files, prints `action: discarded`
naming the missing file, and exits 0, so cargo compiles as on a miss.
- `.github/workflows/pr-trusted.yml`: after the `release-runner-v2`
restore in `typecheck_release_registry`, `build` and `canary_dry_run`,
and in the `rust` and `vitest 2/2` lanes of `verify_paperclip_runner`
(new matrix key `release_crate: true`), three steps: compute the key
scope, `actions/cache/restore` the crate under
`runner-release-crate-v1-<scope>-<hashFiles(...)>` with no
`restore-keys`, and run `mark-current` when `cache-hit == 'true'`. The
`hashFiles` list covers the toolchain pin, the manifests and lockfile,
the crate sources, the protocol tree and the three fixture trees the
test modules include (two under the Runner package and
`tests/runner-e2e/fixtures` at the repository root).
- `.github/workflows/release-verify.yml`: in the Rust lane of an
own-repository master push, after the debug warm-up: compute the key
scope, look the key up (`lookup-only: true`), and on a miss run `cargo
clean --release -p paperclip-runner-core` and `pnpm build:binary` (the
exact command the readers run, so the entry carries no test-profile
variants), then `actions/cache/save` the same path list under the same
key.
- `scripts/__tests__/runner-release-crate-cache.test.mjs` (new, 10
tests, in `test:release-registry`): the path list and hashed inputs are
the expected ones and exist; every `include_str!` and `include_bytes!`
in the crate sources resolves under a hashed input, whether its argument
is a literal or a `concat!` of literals, `env!("CARGO_MANIFEST_DIR")`
and macro metavariables, and any other form fails the test by name (this
guard found the `test/fixtures` tree during development and the
`tests/runner-e2e/fixtures` tree in review); the parser itself is tested
on a synthetic crate for each supported form and six rejected ones;
every PR reader restores after the dependency cache and marks before its
build command with the script's exact path list and key and no
`restore-keys`; the Verify lanes are gated by `release_crate`; the
writer runs after the checks with the lookup, the clean and build, and
the save under the readers' exact path list and key; the scope changes
with the compiler and the checkout root and survives a missing `rustc`;
`mark-current` makes every artifact newer than the checkout, leaves a
dependency's artifacts alone, discards a restore missing any one of the
seven required files (one case each, checking the named reason), and
still marks a restore missing any one of the seven files cargo does not
need.

## Review fixes

Greptile's two findings on the first commit were both valid and are
fixed in the second commit:

- **Incomplete caches looked usable.** `REQUIRED` checked four files,
but cargo's freshness check needs seven. Measured with cargo 1.97.1 on
the real crate (restore, touch the artifacts, delete one file, build):
without the lib's fingerprint hash, dep-info, rlib or rmeta it
recompiles the crate (24s to 27s); without the bin's fingerprint hash,
dep-info or the binary under `deps` it relinks (1.5s); without either
`.json` fingerprint record, either rustc `.d` file, the uplifted binary
or its `.d` it reports the crate fresh in 0.15s and recreates the
uplifted binary from `deps`, and the staging step then copies it.
`REQUIRED` now lists exactly the seven files, the glob for the binary
under `deps` excludes the `.d` beside it, and the test removes each of
the seven in turn (discarded, naming it) and each of the other seven in
turn (still marked).
- **Composed include paths escaped the guard.** The regex matched only
`include_str!("literal")` and skipped `include_str!(concat!(...))`,
which the crate uses four times (30 of 34 includes were checked). The
guard now parses every include argument and resolves the `concat!`
forms; one of them, in `provider_events.rs`, reads
`tests/runner-e2e/fixtures/native-completion/terminal-tool-carrier.json`
at the repository root, outside every hashed input. It is test-only, so
today's release binary does not read it, but the key is meant to cover
every include whatever its build, so `tests/runner-e2e/fixtures/**` (9
files, 80 KB) joins `HASHED_INPUTS` and the six key embeddings in the
two workflows. With the first commit's input list, the new guard fails
on exactly that include.
- `doc/RELEASE-AUTOMATION-SETUP.md`: a "Runner release crate cache"
section under the Runner verification dependency cache, with the key,
the writer, the readers and the trust boundary.
- `package.json`: the new test file in `test:release-registry`.

## Verification

- `node --test scripts/__tests__/runner-release-crate-cache.test.mjs`:
10 tests pass, three consecutive runs.
- The second commit, with the real toolchain on the real crate (`rustc
1.97.1`, cold build 2m20s, the crate's artifacts 74 MB): every source
touched to a fresh-checkout mtime and the archived artifacts restored,
cargo compiles (`Compiling paperclip-runner-core`, 24.8s and 25.1s, the
two controls); restored and marked by `mark-current`, `Finished release
profile in 0.16s` with no `Compiling`, and the same on a second build.
Then, for each of the fourteen files cargo wrote for the two units, one
at a time: restored, marked and that file deleted, cargo recompiles
without any of the seven `REQUIRED` files and reports fresh without any
of the other seven; restored with that file deleted and run through
`mark-current`, the seven required ones print `action: discarded` naming
the file and the others print `marked`. A restore holding only the seven
required files builds fresh in 0.15s, cargo recreates the uplifted
binary, and `stage-runner-binary.mjs` copies it into `dist/bin`.
- `node --test '.github/scripts/tests/*.test.mjs'`: 378 of 381 pass. The
3 failures are in `docker-canary-promotion.test.mjs` and fail the same
way on an unmodified `master` checkout in this sandbox (the stand-in
docker writes no `calls.jsonl`).
- `node --test scripts/__tests__/release-verify-workflow.test.mjs
scripts/__tests__/e2e-shard.test.mjs
scripts/__tests__/run-vitest-stable-shard.test.mjs`: 99 of 101 pass; the
2 failures spawn `pnpm`, which is not on this sandbox's PATH, and fail
the same way on `master`.
- Both workflows parse as YAML. No job has a duplicate step name or step
id.
- The mechanism, with the real toolchain (`rustc 1.97.1`, the package's
pin) on a copy of the crate: a cold `cargo build --release -p
paperclip-runner-core --bin paperclip-runnerd` (2m23s here). Then the
artifact set was archived with `tar`, removed, every source re-copied so
each had a new mtime, and the set restored:
- restored, not marked: `Compiling paperclip-runner-core`, 24.6s (the
control; this is what CI does today);
- restored and marked by `mark-current`: `Finished release profile in
0.15s`, no `Compiling`; a second build is the same;
  - one Rust source edited after a marked restore: `Compiling`, 24.0s;
- one protocol schema edited after a marked restore: `Compiling`, 23.9s
(the protocol files enter cargo's dep-info as absolute paths and are
hashed into the key);
- the rlib removed from a restored set: `mark-current` prints `action:
discarded, reason: incomplete: the lib rlib is missing` and removes the
rest, and cargo compiles.
- Not run here: the workflow steps themselves. `pr.yml` pins
`pr-trusted.yml@master`, so this pull request's own `Build` job runs the
current reader steps, and the writer runs only on a master push. The
first PR runs after the merge and after the next master push show the
`Restore the Runner release crate` step's result and the
`paperclip.runner-release-crate.v1` line in their `Build` logs.

## Risks

- Correctness: a reader can only restore artifacts that master built
from inputs byte-identical to its own merge tree, because every input
the build reads is in the key, and the key has no prefix match. A pull
request cannot write. The trust boundary is unchanged: master writes, a
pull request restores master's entry.
- An input the build reads that is outside the hashed patterns would let
a stale artifact pass. The release dep-info lists the crate sources and
the protocol schemas and fixtures; all are hashed. The guard test
resolves every `include_str!` and `include_bytes!` in the crate, literal
or `concat!`, and fails if one lands outside the hashed inputs or uses a
form it cannot resolve, so a new include form cannot slip past it by not
matching a regex.
- GitHub-hosted runners check out under `/home/runner/work`, the
`runs-on` fleets under `/home/runner/_work`. Cargo records the included
protocol files as absolute paths, so an entry from one root is useless
under the other. The checkout root is in the key, so the other root
misses instead of restoring something cargo then discards.
- A cache that does not keep mtimes on restore changes nothing: the
artifacts are then already newer than the checkout, and `mark-current`
sets them to now in any case.
- Cost: one new entry of about 70 MB per distinct input set, written
only by the master Rust lane on a miss, plus one `cargo clean` and
`build:binary` (about 40s to 50s) on that lane when the inputs changed.
The readers pay one restore of about 70 MB (two to three seconds at the
fleet's observed restore speed) and a sub-second `mark-current`.
- An incomplete entry (a writer that saved a partial set) is discarded
by `mark-current` and costs one compile, the same as a miss.

## Model Used

- Claude (Anthropic), model id `claude-fable-5-1` (Claude Fable 5.1),
extended thinking, with tool use (shell, file editing, GitHub CLI, a
local Rust toolchain for the experiment) in a Paperclip agent session.

## 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: devinfoley <139239+devinfoley@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
2026-10-12 11:25:31 -07:00

19 KiB

Release Automation Setup

This document covers the GitHub and npm setup required for the current Paperclip release model:

  • automatic canaries from master
  • manual stable promotion from a chosen source ref
  • npm trusted publishing via GitHub OIDC
  • protected release infrastructure in a public repository

Repo-side files that depend on this setup:

  • .github/workflows/release.yml
  • .github/CODEOWNERS

Note:

  • the release workflows intentionally use pnpm install --no-frozen-lockfile
  • this matches the repo's current policy where pnpm-lock.yaml is refreshed by GitHub automation after manifest changes land on master
  • the publish jobs then restore pnpm-lock.yaml before running scripts/release.sh, so the release script still sees a clean worktree

1. Merge the Repo Changes First

Before touching GitHub or npm settings, merge the release automation code so the referenced workflow filenames already exist on the default branch.

Required files:

  • .github/workflows/release.yml
  • .github/CODEOWNERS

2. Configure npm Trusted Publishing

Do this for every public package that Paperclip publishes.

At minimum that includes:

  • paperclipai
  • @paperclipai/server
  • @paperclipai/ui
  • public packages under packages/

2.1. In npm, open each package settings page

For each package:

  1. open npm as an owner of the package
  2. go to the package settings / publishing access area
  3. add a trusted publisher for the GitHub repository paperclipai/paperclip

2.2. Add one trusted publisher entry per package

npm currently allows one trusted publisher configuration per package.

Configure:

  • workflow: .github/workflows/release.yml

Repository:

  • paperclipai/paperclip

Environment name:

  • leave the npm trusted-publisher environment field blank

Why:

  • the single release.yml workflow handles both canary and stable publishing
  • GitHub environments npm-canary and npm-stable still enforce different approval rules on the GitHub side

2.2.1. Newly added public packages need a bootstrap phase

Trusted publishing is configured on the npm package itself, not at the repo scope. That means a brand-new public package must not be auto-enrolled into CI publishing until its npm package exists and its trusted publisher has been configured.

Repo policy:

  1. add every non-private package to scripts/release-package-manifest.json
  2. set "publishFromCi": true only when CI is expected to publish that package
  3. if the package is not ready for CI publishing yet, keep "publishFromCi": false
  4. complete the package bootstrap before merging any PR that changes a release-enabled new package

Bootstrap sequence for a new package:

  1. publish the package once from a trusted maintainer machine using normal npm auth
  2. open that package on npm and add the paperclipai/paperclip trusted publisher for .github/workflows/release.yml
  3. rerun or dry-run the release flow as needed to confirm CI publishing now works
  4. only then enable "publishFromCi": true

PR CI enforces this by checking changed release-enabled package manifests against npm. That keeps master canary publishing healthy while preserving the no-long-lived-token model for normal CI releases.

2.3. Verify trusted publishing before removing old auth

After the workflows are live:

  1. run a canary publish
  2. confirm npm publish succeeds without any NPM_TOKEN
  3. run a stable dry-run
  4. run one real stable publish

Only after that should you remove old token-based access.

3. Remove Legacy npm Tokens

After trusted publishing works:

  1. revoke any repository or organization NPM_TOKEN secrets used for publish
  2. revoke any personal automation token that used to publish Paperclip
  3. if npm offers a package-level setting to restrict publishing to trusted publishers, enable it

Goal:

  • no long-lived npm publishing token should remain in GitHub Actions

4. Create GitHub Environments

Create three environments in the GitHub repository:

  • npm-canary
  • npm-beta
  • npm-stable

Path:

  1. GitHub repository
  2. Settings
  3. Environments
  4. New environment

5. Configure npm-canary

Recommended settings for npm-canary:

  • environment name: npm-canary
  • required reviewers: none
  • wait timer: none
  • deployment branches and tags:
    • selected branches only
    • allow master

Reasoning:

  • every push to master should be able to publish a canary automatically
  • no human approval should be required for canaries

The scheduled nightly lane also publishes under npm-canary: it is the same trust level (fully automated, no human gate), its runs execute on master so the branch rule is satisfied, and reusing the environment means the nightly lane required no new environments and no npm trusted-publisher changes (publishing still happens from release.yml, see section 2.2).

5.1. Configure npm-beta

Recommended settings for npm-beta:

  • environment name: npm-beta
  • required reviewers: at least one maintainer
  • prevent self-review: enabled when your team size allows it
  • wait timer: none
  • deployment branches and tags:
    • selected branches only
    • allow master

Reasoning:

  • beta promotions are deliberate human decisions; the required reviewer on this environment is the promotion gate
  • create this environment before the first channel: beta dispatch. If the workflow runs first, GitHub auto-creates the environment with no protection rules, and that first beta would publish without approval

Like nightly, beta publishing lives in release.yml, so no npm trusted-publisher changes are needed (see section 2.2).

6. Configure npm-stable

Recommended settings for npm-stable:

  • environment name: npm-stable
  • required reviewers: at least one maintainer other than the person triggering the workflow when possible
  • prevent self-review: enabled
  • admin bypass: disabled if your team can tolerate it
  • wait timer: optional
  • deployment branches and tags:
    • selected branches only
    • allow master

Reasoning:

  • stable publishes should require an explicit human approval gate
  • the workflow is manual, but the environment should still be the real control point

7. Protect master

Open the branch protection settings for master.

Recommended rules:

  1. require pull requests before merging
  2. require status checks to pass before merging
  3. require review from code owners
  4. dismiss stale approvals when new commits are pushed
  5. restrict who can push directly to master

At minimum, make sure workflow and release script changes cannot land without review.

8. Enforce CODEOWNERS Review

This repo now includes .github/CODEOWNERS, but GitHub only enforces it if branch protection requires code owner reviews.

In branch protection for master, enable:

  • Require review from Code Owners

Then verify the owner entries are correct for your actual maintainer set.

Current file:

  • .github/CODEOWNERS

If @cryppadotta is not the right reviewer identity in the public repo, change it before enabling enforcement.

9. Protect Release Infrastructure Specifically

These files should always trigger code owner review:

  • .github/workflows/release.yml
  • scripts/release.sh
  • scripts/release-lib.sh
  • scripts/release-package-map.mjs
  • scripts/create-github-release.sh
  • scripts/rollback-latest.sh
  • doc/RELEASING.md
  • doc/PUBLISHING.md

If you want stronger controls, add a repository ruleset that explicitly blocks direct pushes to:

  • .github/workflows/**
  • scripts/release*

10. Do Not Store a Claude Token in GitHub Actions

Do not add a personal Claude or Anthropic token for automatic changelog generation.

Recommended policy:

  • stable changelog generation happens locally from a trusted maintainer machine
  • canaries never generate changelogs

This keeps LLM spending intentional and avoids a high-value token sitting in Actions.

11. Verify the Canary Workflow

After setup:

  1. merge a harmless commit to master
  2. open the Release workflow run triggered by that push
  3. confirm it passes verification
  4. confirm publish succeeds under the npm-canary environment
  5. confirm npm now shows a new canary release
  6. confirm a git tag named canary/vYYYY.MDD.P-canary.N was pushed

Install-path check:

npm install --prefix "$(mktemp -d)" paperclipai@canary --no-audit --no-fund

The release script runs this clean-prefix install after publishing every workspace package dependency-first and publishing paperclipai last. A package that is not yet registry-visible stops the train before the channel entrypoint can advance.

12. Verify the Stable Workflow

After at least one good canary exists:

  1. resolve the target stable version with ./scripts/release.sh stable --date YYYY-MM-DD --print-version
  2. prepare releases/vYYYY.MDD.P.md on the source commit you want to promote
  3. open Actions -> Release
  4. run it with:
    • source_ref: the tested commit SHA or canary tag source commit
    • stable_date: leave blank or set the intended UTC date like 2026-03-18 do not enter a version like 2026.318.0; the workflow computes that from the date
    • dry_run: true
  5. confirm the dry-run succeeds
  6. rerun with dry_run: false
  7. approve the npm-stable environment when prompted
  8. confirm npm latest points to the new stable version
  9. confirm git tag vYYYY.MDD.P exists
  10. confirm the GitHub Release was created

Implementation note:

  • the GitHub Actions stable workflow calls create-github-release.sh with PUBLISH_REMOTE=origin
  • local maintainer usage can still pass PUBLISH_REMOTE=public-gh explicitly when needed

13. Suggested Maintainer Policy

Use this policy going forward:

  • canaries are automatic and cheap
  • stables are manual and approved
  • only stables get public notes and announcements
  • release notes are committed before stable publish
  • rollback uses npm dist-tag, not unpublish

14. Troubleshooting

Trusted publishing fails with an auth error

Check:

  1. the workflow filename on GitHub exactly matches the filename configured in npm
  2. the package has the trusted publisher entry for the correct repository
  3. the job has id-token: write
  4. the job is running from the expected repository, not a fork

Stable workflow runs but never asks for approval

Check:

  1. the publish job uses environment npm-stable
  2. the environment actually has required reviewers configured
  3. the workflow is running in the canonical repository, not a fork

CODEOWNERS does not trigger

Check:

  1. .github/CODEOWNERS is on the default branch
  2. branch protection on master requires code owner review
  3. the owner identities in the file are valid reviewers with repository access

Runner verification dependency cache

release-verify.yml runs Verify Paperclip Runner on two independent runners. The protocol lane runs check:eval-kernel and check:protocol. The Rust lane runs check:runner and check:api-authority. Together they retain every check in check:all; both lanes must pass before Cloud source verification or readiness can succeed. A failed lane does not cancel the other lane.

Both lanes restore Cargo dependencies with the pinned Rust Cache action. The compiler comes from the Runner package's rust-toolchain.toml before the action computes its key. Compiler and Cargo metadata changes select a new cache. The release-runner-v2 shared key avoids separate copies for these lanes. Only the Rust lane saves this cache. After verification it also runs build:rust to warm the debug dependencies used by the protocol lane; its own tests already warm release dependencies. The cache writer is shorter than the protocol lane.

GitHub matches a cache entry on its key and on a version hash of the absolute paths in the entry. The master writer runs on the RunsOn fleet, where the checkout is /home/runner/_work/paperclip/paperclip. The trusted PR workflow restores the same entry read-only on GitHub-hosted runners, where the checkout is /home/runner/work/paperclip/paperclip. A Pin the Runner Rust workspace path step in both workflows links $HOME/paperclip-runner-rust to the Runner crate and passes that path to the cache action, so both layouts hash the same paths and the PR lanes can restore master's entry. The guard tests under .github/scripts/tests/ require this step, with identical text, before every Rust cache step in both workflows.

Workspace crates and installed Cargo binaries are excluded from this entry. Every run runs all assigned checks, including on a cache hit. Only an own-repository master-push run verifying that push's exact SHA can restore the cache, and only a successful Rust lane saves it. PR, tag, and manual candidate verification compile without this cache. A miss or eviction costs compilation time but does not change the checks. To discard old dependency caches, increment the shared-key version and let the next successful master verification warm it.

Runner release crate cache

The dependency entry leaves the Runner's own crate out, and a fresh checkout invalidates cargo's mtime fingerprints for workspace crates anyway, so every pull request build compiled paperclip-runner-core in release mode from scratch (28-49s per job on 2026-10-11) although most master commits leave its inputs untouched. A second, content-addressed entry holds only that crate's release artifacts: its fingerprints, the lib's rlib and rmeta, the paperclip-runnerd binary and their dep-info, about 70 MB. The path list and the key inputs live in scripts/runner-release-crate-cache.mjs, which both workflows call, and scripts/__tests__/runner-release-crate-cache.test.mjs holds the readers and the writer to them.

The key is runner-release-crate-v1-<scope>-<hashFiles>. The scope names the platform, the pinned compiler (rustc --version --verbose: release, commit and host) and a hash of the checkout root, because cargo's dep-info records the protocol files the crate includes by relative path as absolute paths. The hashFiles part covers every input the build reads: the toolchain pin, the manifests and lockfile, the crate sources, the protocol schemas and fixtures, and the three fixture trees the test modules include (two under the Runner package and tests/runner-e2e/fixtures at the repository root). Any change to any of them selects a new key. A guard test resolves every include_str! and include_bytes! in the crate, whether its argument is a literal or a concat! of literals, env!("CARGO_MANIFEST_DIR") and macro metavariables, and fails on an include that lands outside these patterns or uses a form it cannot resolve. Readers pass no restore-keys: a prefix match would hand cargo another revision's output.

The writer is the Rust lane of the same master-push verification, after its checks and the debug warm-up. It looks the key up first and, on a miss, runs cargo clean --release -p paperclip-runner-core and then the package's build:binary (the exact command the readers run) before saving, so the entry carries no test-profile variants. In the trusted PR workflow, the Typecheck, Build and Canary Dry Run jobs and the two Verify Paperclip Runner lanes that build the crate (rust and the final vitest shard) restore the entry read-only right after the dependency restore. On a hit, mark-current sets the mtime of every restored artifact to now, so cargo's freshness check sees every source as older than the build and keeps the artifacts. A restore that lacks any file cargo reads or checks for either unit (the fingerprint hash and dep-info of each unit, the lib's rlib and rmeta, the binary under deps; measured with cargo 1.97.1, which recompiles without any one of them and recreates the uplifted binary without any of the rest) is removed instead, the job log names the missing file, and cargo compiles as on a miss. pnpm build then prints Finished release profile in well under a second for that crate. On a miss nothing changes: cargo compiles the crate as before.

The trust boundary is unchanged: only master writes, a pull request can only restore master's entry, and it restores only artifacts built from inputs byte-identical to its own merge tree.

The trust boundary is the protected master branch, not the cache-key text. GitHub does not let master restore caches created by a child branch, sibling branch, tag, or PR merge ref. Both permitted restore scopes (current branch and default branch) are master here. A workflow with authority to execute arbitrary code on master can affect verification directly and is already trusted. The cache contains dependency build artifacts, not credentials or workspace output. See GitHub cache access restrictions.

Chat integration test shards

Release verification runs the large chat integration file on three independent runners. Five other server shards cover every remaining general server file. The ordinary local test command and trusted PR workflow keep their complete general-server group. Each chat case shuts down its services, pauses its own still-active endpoints, and retires its active/waiting conversations after assertions. This keeps workers in later cases from claiming earlier fixtures in the shared test database. Application assertions stay unchanged.

Each chat job collects active tests with Vitest, groups cases by source line, and balances those groups by case count. Parameterized cases and loop-generated cases on one line stay together. The job re-collects with the exact line filters it will execute and fails if the selected case identities differ. Hooks and test execution remain sequential inside each runner with its own temporary home.

Run one shard locally with:

pnpm test:run:general -- --group general-chat --shard-index 0 --shard-count 3

Use indexes 0, 1, and 2 to run the complete chat suite. The CLI validates that each shard has work and that collection includes usable source locations. A Vitest collection or filtering change fails verification instead of dropping tests. Splitting adds three release-verification jobs and repeats collection and fixture setup; it does not make a single test faster.

The file-duration manifest also records the native Codex Runner integration suite's measured import and execution cost, so the existing file balancer accounts for it in both ordinary PR and release verification.

Cloud readiness runner placement

When AWS routing is enabled, Cloud image builds use paperclip-cloud-build-x64 and source verification uses paperclip-post-merge-x64. The artifact wait and the Cloud source verified v1 and Cloud deployable v1 marker jobs run on GitHub-hosted runners. These small jobs must not hold or wait for capacity in the source-verification fleet. During a merge burst, even a completed build must wait for its marker before consumers can recognize readiness.

Runner placement does not change readiness requirements: exact-source artifacts, all source checks, and the image verification must still pass. The versioned markers and their dependency gates are unchanged.