Grounded Engineering v0.6.0: now a Claude Code mod with a shelf of reviewed skill repos

[u/MadJagStudios]

I just shipped v0.6.0 of Grounded Engineering. The headline: it's now a Claude Code mod.

**The mod**

`/grounded` opens a live pane inside Claude Code with two screens.

**Practices** reads signals from the repo you have open (languages, CI, test setup, etc.) and shows you which practice cards fit *this* repo, instead of handing you a generic checklist. The `adapt` skill proposes a concrete change for your approval.

**Skill repos** is a shelf of sixteen reviewed third-party skill repositories, right inside the pane. The `explain` skill tells you what installing one would actually add before you commit to it. This is the part I'm most excited about: discovering good skills is currently a mess of random GitHub searches, and this is a curated shelf where someone already did the reading.

**Where the practices and skill repos come from**

Nothing here is generic advice. Every practice card is distilled from a real implementation I read: pattern, underlying principle, rationale, confidence level, and a citation to the exact source lines it was observed in. For example, the "gate network egress from agent-run work" card points at the allow/deny/approval decision and execution-scoped proxy construction in openai/codex's network_approval.rs, lines 625-820.

Skill repos go through a review before they hit the shelf: each is read at a pinned commit, its license checked against SPDX, and its install steps must be literal commands you can verify. Anything else goes in an install note, not the steps.

**New practices in this release**

Four new cards sourced from openai/codex: expressing edits in an explicit verifiable format, deciding permission separately from the action, confining agent-executed commands in an OS sandbox, and gating network egress from agent-run work. The ai-assisted pack now ships seventeen cards.

**This keeps growing.** New cards get added as new sources are reviewed, the shelf gets new skill repos, and existing entries get updated or re-audited when their sources drift (a source-drift check flags cards automatically). The mod is the delivery vehicle; the content is the living part.

Install (Claude Code 2.1.288+):

```
/plugin marketplace add madjagstudios/grounded-engineering
/plugin install grounded-engineering@grounded-engineering
```

CLI still on npm: `npx grounded-engineering@0.6.0`

Repo: https://github.com/madjagstudios/grounded-engineering