running-ci-preflight Pass

Catch the deterministic CI failures reachable from your diff before pushing, with `hogli ci:preflight`. Use when the pre-push hook blocks a push, before reporting a task done, or after editing Python, serializers, migrations, workflows, or dependency manifests — to avoid burning a CI matrix on a failure you could catch locally (formatting, lint, broken lockfiles, OpenAPI drift, migration conflict, stale branch). Trigger terms: ci:preflight, preflight, pre-push checks, pre-push hook failed, "will this break CI".

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// Install Skill

Install Skill

Skills are third-party code from public GitHub repositories. SkillHub scans for known malicious patterns but cannot guarantee safety. Review the source code before installing.

Install globally (user-level):

npx skillhub install PostHog/posthog/running-ci-preflight

Install in current project:

npx skillhub install PostHog/posthog/running-ci-preflight --project

skill.install.customTargetHelp

npx skillhub install PostHog/posthog/running-ci-preflight --target-dir /path/to/skills

Suggested path: ~/.claude/skills/running-ci-preflight/

AI Review

70
out of 100
Instruction Quality65
Description Precision95
Usefulness62
Technical Soundness65

Scored 70 thanks to an excellent description with many triggers and clear internal workflow logic, but limited by being entirely specific to the PostHog repository and requiring its proprietary `hogli` CLI. Valuable as part of a "Contributing to PostHog" bundle.

productionmoderateposthog-contributorsbackend-devsci-preflightpre-push-checkslint-fixingmigration-conflictopenapi-drift
Reviewed by review-skill-gateway(z-ai/glm-5.2) on 8/1/2026

SKILL.md Content

---
name: running-ci-preflight
description: >
  Catch the deterministic CI failures reachable from your diff before pushing, with `hogli ci:preflight`.
  Use when the pre-push hook blocks a push, before reporting a task done, or after editing Python,
  serializers, migrations, workflows, or dependency manifests — to avoid burning a CI matrix on a failure
  you could catch locally (formatting, lint, broken lockfiles, OpenAPI drift, migration conflict, stale branch).
  Trigger terms: ci:preflight, preflight, pre-push checks, pre-push hook failed, "will this break CI".
---

# Running ci:preflight

`hogli ci:preflight` scopes a curated set of checks to the files your branch touched — each mapped to a
CI failure class that has taken master down — plus an always-on branch-freshness check. It is the
pre-push counterpart to `hogli ci:insights` (what is _already_ broken on master).

The pre-push hook runs `ci:preflight --strict` automatically and blocks the push on failed checks.
**Never bypass it with `--no-verify`** — fix what it reports instead.

## The loop (when the hook blocks, or before reporting done)

```sh
hogli ci:preflight --fix
```

1. Run with `--fix` — it formats, lints, and auto-fixes what is safe.
2. Read each line: `✓ pass`, `✗ fail`, `→ advisory` (do it yourself), `· skipped` (capability absent).
3. Resolve every `✗ fail` — these are what `--fix` could not (real lint error, broken lockfile, migration conflict). These block the push.
4. Act on every `→ advisory` — e.g. `openapi` advisory → run `hogli build:openapi` and commit the drift; `staleness` advisory → `git merge origin/master`. Advisories never block, but ignoring them ships the failure to CI. **Resolve them before pushing, including drift you didn't introduce — you own the branch state you push.**
5. Re-run until clean, then push.

## Notes

- **Strict = failures only.** `--strict` (what the hook runs) exits non-zero only on `✗ fail` — advisories are unverifiable-locally classes, so they warn without blocking. A clean exit means "nothing left to fix", not "CI will pass" — CI stays the authoritative gate. Non-blocking is a mechanism limit, not permission to skip.
- **`type-check` is a nudge, not a run.** Only a repo-wide mypy run matches CI (mypy follows imports, so a changed-file subset misses reverse-dependency breakage), and that costs minutes cold — too much to tax every push with. So preflight names the command instead of running it: judge whether your change is type-risky and run it yourself. CI blocks on the same command, so a type error you skip here comes back as a full re-run.
- **Staleness is risk-based.** It fires when merging master _now_ would actually break something — textual merge conflicts (computed via `git merge-tree`, working tree untouched), migrations added on both sides, generated-file inputs changed on both sides, or CI workflows changed on master — plus a behind/age backstop, aggressive by default (5 commits / 2 days; env-tunable via `HOGLI_PREFLIGHT_STALE_COMMITS`/`HOGLI_PREFLIGHT_STALE_DAYS`) so we over-warn to start and tune down from telemetry. Merge master in when it fires. Advisory only, never auto-merged.
- **`· skipped (needs stack/node)`** is expected on a bare checkout or sandbox. Start the stack with `hogli start` to run those, or let CI cover them. No hooks in your environment (no `node_modules`)? Run the loop yourself before pushing.
- **Flags.** `--against <ref>` diffs against an explicit base; `--json` emits a machine-readable summary.
- **Kill switch.** `HOGLI_PREFLIGHT_DISABLED=1` makes the command (and the hook) a no-op with exit 0. It is a rollout/emergency lever — respect it; never unset it to force a run.

## Why it matters

Drafts already run a trimmed CI subset; the expensive waste is a ready PR that fails the full matrix on
something deterministic, gets fixed, and re-runs the whole matrix. Catching that locally is the cheapest
CI saving available.

License

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The full license text is available in the source repository.

View the license in the source repositorythe version published there is authoritative.