# DEVX-167: Add dependency-graph, deployment-coordination, and skill-creation skills

## Problem
Agents working across the oblachno ecosystem lack shared, persistent
context for three recurring pain points:

1. **Cross-repo dependency ordering** — agents frequently merge
   downstream PRs before the upstream publish job completes, or forget
   to bump infra. There is no single reference for which repo produces
   what and in what order changes must propagate.
2. **devx release coordination** — devx is the base package pinned by
   grm, sso-bridge, and infra. Agents repeatedly merge devx PRs and
   immediately merge downstream bumps without waiting for the PyPI
   publish job, or bump only one consumer when a change affects all
   three.
3. **Skill quality drift** — skills are created ad hoc with inconsistent
   structure, vague advice, and no automated validation reference. New
   skills miss required sections, reference nonexistent make targets,
   and drift across repos.

## Approach
Add three SKILL.md files under `.devin/skills/`:

REQ-1: `dependency-graph` — shared skill mapping the oblachno ecosystem
(repos, what each produces, consumers, release triggers, correct
cross-repo change order, state verification checklist)

REQ-2: `deployment-coordination` — devx-specific skill covering the
devx release flow, downstream consumers, manual bump procedure, and
common mistakes when coordinating a devx change

REQ-3: `skill-creation` — shared skill defining skill structure,
quality standards, scope rules, automated validation reference, and a
creation checklist

## Files Affected
- `.devin/skills/dependency-graph/SKILL.md` (new)
- `.devin/skills/deployment-coordination/SKILL.md` (new)
- `.devin/skills/skill-creation/SKILL.md` (new)
- `docs/specs/DEVX-167.md` (new)

## Test Plan
- Verify all three SKILL.md files follow the required structure (H1
  title, When to Invoke, Prerequisites sections)
- Verify referenced make targets and file paths exist
- Run `make pytest-cov` — skill validation tests must pass

## Deploy Plan
- Merge to master; skills are consumed by agents immediately on next
  invocation — no build or deploy step required

## Rollback Plan
- Revert the merge commit; remove the three skill directories

## Acceptance Criteria
- [x] REQ-1: dependency-graph skill exists with ecosystem map, repo
      table, dependency chain, cross-repo change order, and state
      verification checklist
- [x] REQ-2: deployment-coordination skill exists with devx release
      flow, downstream consumer table, coordination steps, and common
      mistakes
- [x] REQ-3: skill-creation skill exists with structure template,
      quality standards, scope rules, validation reference, and
      creation checklist