rch git:20260715.baaa9e2A

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---
name: rch
user-invocable: false
skill_api_version: 1
hexagonal_role: supporting
consumes: []
produces: []
context_rel: []
metadata:
  dependencies: []
  capabilities: [rch]
  effects: []
  canonical_status: canonical
  disposition: keep_specialist
  tier: execution
description: 'Use RCH once to offload a build or collect remote-compilation diagnostics. Triggers: "use RCH", "offload this build".'
practices:
- pragmatic-programmer
output_contract: remote compilation status and diagnostic evidence
---
# RCH — remote compilation specialist

RCH can offload one explicit compilation command or inspect the remote compiler
path. This skill reports what happened; it does not govern retries or repair.

## Procedure

1. Capture `rch check`, `rch doctor --json`, worker status, and the relevant
   `[RCH]` summary before mutation.
2. For diagnosis, identify the first failing stage: availability, configuration,
   hook, classification, sync, remote compile, or worker pressure.
3. Run only the caller-authorized command or documented safe diagnostic once.
4. Capture the exact command, worker when known, exit code, local-fallback reason,
   and post-action status.
5. Stop and return the evidence.

`[RCH] local (...)` means the requested remote-offload claim was not proved even
when the local build succeeds. Destructive cleanup, worker deployment, daemon
configuration, and remote mutation require explicit caller authority.

## Output

Return a factual packet with status (`remote`, `local_fallback`, `failed`, or
`not_proven`), commands and exit codes, worker, summary line, and checked/not
checked surfaces. Do not include a next action.

## References

- [Fail-open reasons](references/FAIL_OPEN.md)
- [Error catalog](references/ERROR_CODES.md)
- [Troubleshooting](references/TROUBLESHOOTING.md)
- [Recovery playbooks](references/RECOVERY_PLAYBOOKS.md)
- [Worker operations](references/WORKERS.md)
- [Configuration](references/CONFIGURATION.md)
- [Machine-readable surfaces](references/MACHINE_INTROSPECTION.md)