feat(cli): bundle agentv-dev skills and add agentv skills subcommand

[christso]

Closes #1224

Summary

• Adds agentv skills subcommand with list, get, path sub-commands
• Bundles all six agentv-dev skills into the npm package at apps/cli/skills/ → dist/skills/ at build time
• Converts marketplace plugin SKILL.md files to discovery stubs pointing to agentv skills get <name>
• Updates installation docs so the canonical setup is npm install -g agentv alone

Changes

CLI subcommand (apps/cli/src/commands/skills/index.ts):

• agentv skills list — list available skill names (--json)
• agentv skills get <name> — print SKILL.md content (--full includes references/, --json)
• agentv skills get --all — print all skills
• agentv skills path [<name>] — print resolved skills directory

Resolution walks upward from the module file, validating by SKILL.md presence to avoid false matches on the src/commands/skills/ directory itself. Prefers dist/skills/ (production layout).

Build pipeline (apps/cli/tsup.config.ts):

• onSuccess copies apps/cli/skills/ → dist/skills/ alongside templates and studio assets

Skill content (apps/cli/skills/):

• Full skill content moved here as the single source of truth (was in plugins/agentv-dev/skills/)
• Includes all six skills: agentv-bench, agentv-eval-writer, agentv-eval-review, agentv-governance, agentv-onboarding, agentv-trace-analyst, plus their references/, scripts/, agents/ subdirectories

Plugin stubs (plugins/agentv-dev/skills/*/SKILL.md):

• Rewritten to discovery stubs: keep the description: frontmatter (for trigger matching) and redirect agents to agentv skills get <name>

Docs (apps/web/src/content/docs/docs/getting-started/installation.mdx):

• Canonical setup is now npm install -g agentv + agentv skills get agentv-onboarding
• allagents plugin block moved to optional "Claude Code Plugin" section

Red/Green UAT

Before (no skills subcommand):

$ agentv skills list
error: Unknown command "skills"

After:

$ agentv skills list
agentv-bench
agentv-eval-review
agentv-eval-writer
agentv-governance
agentv-onboarding
agentv-trace-analyst

$ agentv skills get agentv-bench | head -5
---
name: agentv-bench
description: >-
  Run AgentV evaluations and optimize agents through eval-driven iteration.

$ agentv skills get agentv-bench --json | python3 -c "import json,sys; d=json.load(sys.stdin); print(d['success'], d['data'][0]['name'])"
True agentv-bench

$ agentv skills get does-not-exist; echo "Exit: $?"
Error: skill 'does-not-exist' not found
Available skills: agentv-bench, agentv-eval-review, agentv-eval-writer, agentv-governance, agentv-onboarding, agentv-trace-analyst
Exit: 1

Test plan

• bun run test — all 2346 tests pass (527 CLI + 1752 core + 67 eval)
• 9 new unit tests covering: listSkillNames, readSkill (SKILL.md content, frontmatter with hidden:true, not-found, --full with references, --full with no extra dirs), collectDir
• agentv skills list returns all 6 skill names
• agentv skills get agentv-bench returns full 428-line SKILL.md
• agentv skills get agentv-bench --json returns valid JSON with stable schema
• agentv skills get does-not-exist exits 1 with error message
• agentv skills path returns resolved dist/skills directory
• Pre-push hook passed: build, typecheck, lint, tests, validate:examples all green

[cloudflare-workers-and-pages]

Deploying agentv with    Cloudflare Pages

Latest commit:	da04aad
Status:	✅  Deploy successful!
Preview URL:	https://6794b51e.agentv.pages.dev
Branch Preview URL:	https://feat-1224-bundled-skills.agentv.pages.dev

View logs

[christso]

Review: agentv skills subcommand

Verdict: PASS (approve — can't self-approve via API)

E2E Testing

All 6 commands tested against the built dist:

Command	Result
agentv skills list	Clean plain-text list of 6 skills
agentv skills get agentv-bench	Full 428-line SKILL.md — excellent AI-consumable density
agentv skills get agentv-bench --full	SKILL.md + 7 reference files, separated by --- references/foo.md --- headers
agentv skills path	Returns resolved absolute path to skills dir
agentv skills get does-not-exist	Error: skill 'does-not-exist' not found + lists available skills, exits 1
agentv skills get --all	All 6 skills with === skill-name === separators

An AI agent reading only CLI output gets: what AgentV is, how to run evals, what graders exist, how to interpret results. The SKILL.md content is well-structured for AI consumption.

Code Review

All passing:

• findSkillsDir() walk + isValidSkillsDir() validation correctly handles both source and dist layouts
• tsup.config.ts onSuccess properly cleans (rmSync) then copies apps/cli/skills/ → dist/skills/
• Plugin SKILL.md stubs preserve full description: frontmatter with clean redirect instructions
• 9 unit tests with proper temp dir cleanup, covering all key paths
• Wire format correct (success/data keys are single-word, no case issues)
• No YAGNI violations — 3 subcommands, minimal flags, stateless filesystem reads

Non-blocking follow-ups

1. agentv-onboarding/SKILL.md — <skill-dir> placeholder never resolves itself. Add: "Run agentv skills path agentv-onboarding to get the skill directory path." Makes the skill self-sufficient without filesystem context.

2. agentv-bench/SKILL.md — References agents/grader.md etc. but --full only includes references/. The skill should tell agents: "Run agentv skills path agentv-bench to locate <skill-dir>/agents/<name>.md."

3. agentv-eval-review/SKILL.md — python scripts/lint_eval.py is a bare relative path; consider $(agentv skills path agentv-eval-review)/scripts/lint_eval.py for portability.

These are plugin content improvements, not blockers for merging. Implementation is correct and clean.