feat(repo-config): add per-repo .github-app.yaml control surface - #286
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📝 WalkthroughWalkthroughThe change expands repository configuration to cover workflow policies, triggers, agent controls, schema tooling, PR validation, and scheduler integration. It adds fail-open policy loading, prompt integration, cancellation cleanup, generated-schema checks, and extensive validation tests. ChangesRepository configuration and policy controls
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🟠 High · up to Repository configuration can currently expand automated execution capabilities and apply trusted review instructions, while documented workflow defaults are not honored; this can change privileged run behavior and requires owner attention before merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Promotes the scheduler-only config reader into a first-class per-repo control
surface under `src/repo-config/`, and adds the two gates that consume it.
- Move `src/scheduler/config-schema.ts` + `config-fetcher.ts` to
`src/repo-config/{schema,fetcher}.ts` and widen the document schema beyond
scheduled actions. The fetcher now returns a discriminated
`ok` / `absent` / `invalid` result instead of a nullable value.
- Add `src/repo-config/effective.ts` to merge `workflows.<name>` over
`defaults` and clamp the result against the server env ceilings, failing
open to `DEFAULT_REPO_POLICY`.
- Add `src/repo-config/gate.ts` (Gate 1): a narrowing-only pre-dispatch check.
Every rule can refuse, none can permit, so no YAML value can readmit a repo
the `ALLOWED_OWNERS` env allowlist rejected.
- Add `src/repo-config/pr-check.ts`, the one module that reads a head-ref
copy. It is read-only by construction and imports neither `fetchRepoConfig`
nor `loadRepoPolicy`, so a head-ref read can never populate the fetcher
caches or reach the applied policy.
- Add `src/core/agent-policy.ts` (Gate 2) and apply the resolved knobs in the
pipeline and prompt builder.
- Rename `SCHEDULER_CONFIG_FILE` to `REPO_CONFIG_FILE`, keeping the old name
as a deprecated fallback with a one-shot boot warning.
- Generate `schema/github-app.schema.json` from the zod schema and gate it in
CI via `check:config-schema`, so the `$schema` modeline authors consume
cannot advertise a surface the runtime rejects.
Only the default branch's copy is ever applied: `fetchRepoConfig` calls
`getContent` with no `ref`, so a config edit inside a pull request is inert
for that pull request.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KUPpJPtxAaHWrBsjytRGyM
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Review found that the config surface landed here while every production call site that consumes it landed in the isolated-workflow-runner change, so Gate 1, Gate 2 and the PR config-check were unreachable outside tests while the docs claimed they were applied. The wiring cannot move here: the dispatch chokepoints depend on `runs-store` columns introduced by migration 017. - `docs/use/repo-config.md`: the status table now says which blocks actually take effect today (`review_learnings`, `scheduled_actions`, `config`) and which are parsed-and-validated only, with a warning admonition naming the three uncalled entry points. Drops the citation of `src/orchestrator/workflow-runner-payload.ts`, which does not exist yet. - `src/shared/ws-messages.ts`: declare `policy` on the job payload. The wire schema now matches the exported `AgentPolicy` type; without the key a plain `z.object` would silently strip a policy a future producer sent. - Revert `src/shared/dispatch-types.ts` and `src/core/tracking-comment.ts` to their `main` versions. The `workflow-runner` dispatch target has no producer here and its DB CHECK constraint is not relaxed until migration 017, so widening the type now would advertise a value the database rejects. The `configWarning` banner and its test move to the runner change with their producer. - `src/core/pipeline.ts`: the comment justifying the missing review-only gate named `stripInstructionsUnlessReview`, which exists nowhere. Replaced with what is actually true, including the gap it leaves. - `package.json`: `picomatch` pinned to `4.0.5` to match the pre-existing `overrides` entry and the lockfile. The `4.0.4` pin never described what ran. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KUPpJPtxAaHWrBsjytRGyM
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Actionable comments posted: 7
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Inline comments:
In `@docs/operate/configuration.md`:
- Line 178: Move the REPO_CONFIG_FILE documentation out of the scheduler-only
section into a repository-configuration section, while keeping the deprecated
SCHEDULER_CONFIG_FILE row adjacent so the fallback remains discoverable. Ensure
the scheduler section’s server-mode-only scope no longer applies to
REPO_CONFIG_FILE.
In `@docs/use/repo-config.md`:
- Around line 245-248: Update docs/use/repo-config.md lines 245-248 to describe
enabled:false behavior as planned until Gate 1 is wired, and update lines
548-560 to describe pull-request validation comments as planned until the
read-only handler is wired; do not present either behavior as currently
implemented.
In `@schema/github-app.schema.json`:
- Around line 398-469: Update the generated prompt schema for promptRefSchema so
the emitted union accepts the documented shorthand inputs { inline: string } and
{ ref: string } in addition to the tagged form branches, preserving the existing
validation constraints and runtime behavior. Ensure z.toJSONSchema output no
longer requires form for these shorthand shapes.
In `@src/repo-config/effective.ts`:
- Line 156: Update the effective workflow configuration construction to use the
corresponding defaults as fallbacks for enabled, path_filters, and instructions
when an entry-level value is absent. Preserve entry-level values when provided
and keep auto entry-only as documented; update the logic around the enabled
field and the path_filters and instructions fields.
In `@src/repo-config/fetcher.ts`:
- Around line 205-208: Update the invalid repository configuration warning in
the safeParse handling to log the sanitized summary returned by
formatConfigIssues(result.error.issues) instead of the raw result.error.issues
array, while preserving the existing event metadata and message.
In `@src/scheduler/scheduler.ts`:
- Around line 342-344: Update the fetched.kind handling in the manual-run path
to keep absent configurations on the existing “no valid .github-app.yaml”
reason, while returning the scrubbed, capped validation message from invalid
results (via the existing formatConfigIssues flow) as the reason. Preserve the
enqueued: false result.
In `@test/repo-config/effective.test.ts`:
- Around line 277-279: The longKeys fixture in effective.test.ts currently
places all unknown keys in one object, producing a single unrecognized_keys
issue. Update the fixture to distribute the unknown keys across distinct nested
paths so validation yields separate rendered issues and exercises the
MAX_RENDERED_ISSUES cap.
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📒 Files selected for processing (46)
.github/workflows/ci.yml.prettierignoreCLAUDE.mddocs/build/architecture.mddocs/operate/configuration.mddocs/use/repo-config.mdenv-contract.jsonpackage.jsonschema/github-app.schema.jsonscripts/gen-config-schema.tsscripts/validate-repo-config.tssrc/config.tssrc/core/agent-policy.tssrc/core/executor.tssrc/core/pipeline.tssrc/core/prompt-builder.tssrc/orchestrator/connection-handler.tssrc/repo-config/effective.tssrc/repo-config/fetcher.tssrc/repo-config/gate.tssrc/repo-config/pr-check.tssrc/repo-config/schema.tssrc/scheduler/config-fetcher.tssrc/scheduler/config-schema.test.tssrc/scheduler/index.tssrc/scheduler/prompt-resolver.tssrc/scheduler/scheduler.tssrc/shared/workflow-types.tssrc/shared/ws-messages.tssrc/types.tstest/core/agent-policy.test.tstest/core/build-provider-env.test.tstest/core/executor.test.tstest/core/pipeline.test.tstest/core/prompt-builder.test.tstest/repo-config/effective.test.tstest/repo-config/fetcher.test.tstest/repo-config/gate.test.tstest/repo-config/pr-check.test.tstest/repo-config/schema.test.tstest/scheduler/due-evaluator.test.tstest/scheduler/log-fields.test.tstest/scheduler/prompt-resolver.test.tstest/scheduler/scheduler.test.tstest/scripts/gen-config-schema.test.tstest/scripts/validate-repo-config.test.ts
💤 Files with no reviewable changes (2)
- src/scheduler/config-schema.test.ts
- src/scheduler/config-fetcher.ts
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…and docs
Second review round on this PR. Six of seven findings applied.
- `scripts/gen-config-schema.ts`: `promptRefSchema` is a `z.preprocess`, so
`toJSONSchema` only saw the post-preprocess side and every emitted branch
required `form`. Editors therefore flagged `prompt: { inline: "..." }`, the
form the docs and every example recommend and the runtime accepts. Unlike
the dropped `.refine` checks this is a false negative, so the authoring
shapes are added back to the emitted union rather than merely documented.
The injection throws when its anchor is gone, so a schema change that moves
the node fails the CI gate instead of silently losing the shorthands again.
- `src/repo-config/fetcher.ts`: log the rendered `formatConfigIssues` summary
instead of `result.error.issues`. An `unrecognized_keys` issue carries
repository-controlled key names and a raw issue object bypasses the logger's
named-field redaction (CWE-532).
- `src/scheduler/scheduler.ts`: the manual-run reason collapsed `absent` and
`invalid` into one string. It now surfaces the already-scrubbed validation
message so an operator learns why the file was rejected.
- `test/repo-config/effective.test.ts`: the worst-case warning fixture put
eight unknown keys on one object, which zod 4 collapses into a single
`unrecognized_keys` issue, so it rendered one line and never reached
`MAX_RENDERED_ISSUES`. Now one unknown key per workflow block: six issues.
- `docs/operate/configuration.md`: `REPO_CONFIG_FILE` moved out of the
scheduler section, whose intro says "server mode only", into its own section.
- `docs/use/repo-config.md`: the `enabled: false` and PR-validation sections
described unwired behaviour as current. Both now carry a warning admonition.
Not applied: the report that `resolveKnobs` ignores `defaults.enabled`,
`defaults.path_filters` and `defaults.instructions`. `repoDefaultsSchema` is
`z.strictObject(agentKnobsShape)` and none of those fields exist on it, so
`defaults: { enabled: false }` is rejected as an unrecognized key rather than
silently ignored. Reasoning recorded on the thread.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KUPpJPtxAaHWrBsjytRGyM
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bot workflow 🔍 Code review complete, 47 files, +5862/-417. SummaryThis is a well-built control surface. The two things that usually go wrong in a "read config from the repo" feature — reading the PR's copy instead of the default branch's, and echoing attacker-influenced YAML into a public comment — are both handled deliberately and are covered by tests. Validation is clean: Three findings, all minor. None blocks the merge; the first is the one I'd most want addressed, because it leaves two exported What was checked
Findings[minor] [minor] [minor] ReasoningI weighted the security-sensitive paths hardest, because this feature moves repository-authored YAML into agent instructions and into public comments — two places where a mistake is expensive and hard to spot later. Those paths are the strongest part of the change: the default-branch-only read is asserted negatively, the trusted-vs-untrusted split in the prompt is argued rather than assumed, and the scrub-before-truncate ordering shows someone thought about how length-bounded redaction patterns fail. Several things I initially suspected turned out to be already reasoned about in the code or docs, and I dropped them rather than spend your time: the unclamped What remains is mostly about consistency between sibling modules — cost: $4.2285 · turns: 81 · duration: 811s |
…ow-types Three review findings on the repo-config surface. `fetcher.ts` had no size gate before the base64 decode, unlike its sibling `pr-check.ts`. Adds the gate, sharing `MAX_CONFIG_BYTES` from `schema.ts` so the two read paths cannot drift. The empty-`content` case is folded in on purpose: over 1 MB the Contents API returns `content: ""` with `encoding: "none"`, which decoded to "", parsed to null, and surfaced as a root-level schema error blaming the owner's document for a size limit. `touchesConfigFile` was the one GitHub call in `pr-check.ts` that could reject, so `runPrConfigCheck` was not the total function its siblings are. A secondary rate limit or a revoked `pull_requests: read` now no-ops the check instead of throwing into the caller. `workflow-types.ts` carried workflow-runner scaffolding with no consumer on this branch, including a second `HandlerResultSchema` whose shape already disagreed with the registry's. Trimmed 20 export statements to the 9 that have callers; the rest land with the isolated runner. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KUPpJPtxAaHWrBsjytRGyM
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Stack 2 of 3 · base
feat/foundations-config-and-resilience(#285) · next #287What this does
Before this PR,
.github-app.yamlexisted but only the scheduler read it, viasrc/scheduler/config-schema.ts+config-fetcher.ts. This promotes that reader into the single per-repo control surface undersrc/repo-config/, widens the document well beyond cron actions, and wires it into the two places that can act on it.flowchart TD Yaml[".github-app.yaml<br/>default branch root only"]:::input Fetch["fetcher.ts<br/>getContent with NO ref<br/>ETag + negative cache"]:::new Result["RepoConfigResult<br/>ok / absent / invalid"]:::new Eff["effective.ts<br/>merge workflows.name over defaults<br/>then clamp to env ceilings"]:::new Gate1["gate.ts · Gate 1<br/>pre-dispatch, NARROWING ONLY"]:::gate Refuse["refuse + comment<br/>3 rules, static strings"]:::stop Silent["refuse silently<br/>4 passive trigger filters"]:::stop Gate2["agent-policy.ts · Gate 2<br/>model, turns, timeout, tools,<br/>path filters, instructions"]:::gate Run["pipeline + prompt builder"]:::ok Fail["DEFAULT_REPO_POLICY<br/>missing, unreachable or invalid"]:::ok PrChk["pr-check.ts<br/>head-ref read, READ-ONLY<br/>sticky validation comment"]:::iso Yaml --> Fetch --> Result --> Eff Eff --> Gate1 Gate1 -->|"repo off, workflow off,<br/>not in allowed_users"| Refuse Gate1 -->|"draft, title, base branch,<br/>ignore_authors"| Silent Gate1 -->|"admitted"| Gate2 --> Run Result -->|"any error"| Fail --> Gate2 Yaml -.->|"PR head ref, separate path"| PrChk classDef input fill:#ecf0f1,color:#2c3e50 classDef new fill:#2c3e50,color:#ffffff classDef gate fill:#8e44ad,color:#ffffff classDef stop fill:#c0392b,color:#ffffff classDef ok fill:#1e8449,color:#ffffff classDef iso fill:#7f8c8d,color:#ffffffThe three invariants worth reviewing
1. Only the default branch's copy is ever applied.
fetchRepoConfigcallsgetContentwith noref, so editing the config inside a PR is inert for that PR. Do not add arefto that call;test/repo-config/fetcher.test.tsasserts its absence.2. Gate 1 is narrowing only. Every rule can refuse; none can permit. No YAML value can readmit a repo that the
ALLOWED_OWNERSenv allowlist rejected. Of the seven ordered rules, only three earn a public refusal comment; the four passivetriggers.*filters stay silent.ignore_authorsis checked beforeallowed_usersdeliberately: a bot login is normally in the former and absent from the latter, so the other order would answer every Renovate event with a public refusal comment.3.
pr-check.tscannot leak into the applied policy. It is the one module that reads a head-ref copy, so it is read-only by construction: it imports neitherfetchRepoConfignorloadRepoPolicy, meaning a head-ref read can never populate the fetcher caches or reach Gate 2.test/repo-config/pr-check.test.tsasserts the absence of both symbols in that source file.Everything fails open. A missing, unreachable, or schema-invalid file yields
DEFAULT_REPO_POLICYand the run proceeds, with the validation error surfaced as aconfigWarningbanner rather than a dropped job.Generated schema
schema/github-app.schema.jsonis emitted from the zod schema and byte-compared in CI by the newcheck:config-schema. That artifact is what authors consume through a# yaml-language-server: $schema=modeline, so a stale copy would advertise a surface the runtime rejects.It is structural only: zod v4's
toJSONSchemadrops.refine/.superRefine, so prompt-ref path traversal, IANA timezone validity, glob safety inreview.path_filters, and duplicate action names stay runtime-only checks that no editor will catch.scripts/validate-repo-config.ts <path>runs the real pipeline and does cover them.Config rename
SCHEDULER_CONFIG_FILE→REPO_CONFIG_FILE, since the file stopped being scheduler-specific once it grew feature toggles. The old name is still honoured as a fallback so an upgrade does not silently change which file is read, with a one-shot boot warning. Blank counts as unset, because a chart rendering an unset optional key as""would otherwise skip both the fallback and the zod default and leave a path resolving to the repo root.Verification
typecheck·lint·formatcheck:config-schema·check:env-contract(97 vars)check:docs-citations·check:test-globs·check:no-destructivetestReview notes
REPO_CONFIG_FILEslice ofsrc/config.ts. The rest of that file, including the runner capability-secret validation, moved to feat(runner): isolate structured workflows in one-attempt Kubernetes Pods #287 — that validation is unconditional on the controller, so landing it here would stop the controller booting for a feature that does not exist yet.🤖 Generated with Claude Code
https://claude.ai/code/session_01KUPpJPtxAaHWrBsjytRGyM
Summary by CodeRabbit
New Features
.github-app.yamlconfiguration for feature toggles, workflow settings, agent policies, trigger filters, and review learning.Bug Fixes
Documentation