Refresh work-system: safe deps, md tables, sharper status

[gering]

Summary

• Bring work-system up to the safety/consistency level of pr-flow & knowledge-system.
• Defuse the dependency auto-install footgun, modernize output, unify conventions.

Changes

• /continue: project-local installs (npm/cargo/go/…) run without prompts; pip uses a local .venv; only ask when a global install is genuinely unavoidable.
• /list: replaced heavy ASCII boxes with markdown tables (token cost, narrow terminals).
• /status: merged-PR (--head task/<name>) + branch-merge are authoritative completion signals; commit-grep / file-activity demoted to weak corroboration.
• /kickoff + /adopt: unified new-session launch to claude -n "<task-name>" "/continue" (named session + deterministic resume in one command).
• /close: auto-delete remote branch when the PR was merged (no prompt); still asks on manual close.
• README: documented the unified launch command.
• Version: work-system 1.2.5 → 1.3.0 (plugin.json + marketplace.json).

Readiness

• ✅ Version bumped to 1.3.0 (both manifests in sync)
• ✅ README updated for the unified launch command
• ✅ Structure check: 0 errors (scripts/check-structure.py)
• ✅ Knowledge: no new generalizable patterns to capture
• ➖ Tests / Build / Linter / Changelog: N/A (markdown-only plugin repo, no changelog)

Test plan

• python3 scripts/check-structure.py passes (0 errors)
• /list renders markdown tables (no ASCII boxes)
• /continue shows the install command, skips when deps present, uses .venv for pip
• /kickoff / /adopt print claude -n "<task>" "/continue" and it launches a named session that auto-runs the resume flow
• /close on a merged PR removes the remote branch without prompting

🤖 Generated with Claude Code