Add acreadiness-cockpit plugin (AgentRC measure -> generate -> maintain) 🤖🤖🤖 (#1593)

* Add acreadiness-cockpit plugin

Adds a new plugin that drives Microsoft AgentRC from Copilot chat,
framing every interaction inside AgentRC's Measure -> Generate ->
Maintain loop.

Custom agent (agents/ai-readiness-reporter.agent.md):
  Runs `agentrc readiness --json`, interprets every result against
  the 9-pillar / 5-level maturity model, then renders a self-contained
  reports/index.html from a fixed HTML/CSS template (bundled with the
  acreadiness-assess skill) so every user gets an identically styled
  dashboard. Honours policies (disabled criteria, overrides, pass-rate
  thresholds) and surfaces extras separately.

Skills:
  - acreadiness-assess: Measure step. Wraps `agentrc readiness --json`
    and hands off to the @ai-readiness-reporter agent. Bundles the
    canonical report-template.html.
  - acreadiness-generate-instructions: Generate step. Wraps
    `agentrc instructions`. Defaults to .github/copilot-instructions.md
    (Copilot-native). Asks flat vs nested. For monorepos, emits per-area
    .github/instructions/<area>.instructions.md files with applyTo
    globs taken from agentrc.config.json.
  - acreadiness-policy: Maintain step. Helps pick, scaffold, or apply an
    AgentRC policy (criteria.disable, criteria.override, extras,
    thresholds) and wire it into CI via --fail-level.

Plugin (plugins/acreadiness-cockpit/):
  Declarative plugin.json referencing the agent and three skills.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address PR review feedback

- Align documented slash-command names with plugin manifest:
  /acreadiness-assess, /acreadiness-generate-instructions,
  /acreadiness-policy (was /assess, /generate-instructions, /policy
  inside SKILL bodies and argument-hints).
- Move the literal % from the report template into the substituted
  values for {{passRate}} and {{threshold}} so an N/A value of '—'
  no longer renders as '—%'. Updated the agent placeholder contract
  accordingly.
- Point the report footer at the canonical plugin folder under
  github/awesome-copilot instead of the personal source fork.
- Add explicit HTML-escaping rules to the agent: HTML-escape every
  {{placeholder}} substitution, and replace </script with <\/script
  inside the embedded JSON block so untrusted repo content cannot
  break the markup or inject scripts.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

skills/acreadiness-assess/SKILL.md

@@ -0,0 +1,46 @@
+---
+name: acreadiness-assess
+description: 'Run the AgentRC readiness assessment on the current repository and produce a static HTML dashboard at reports/index.html. Wraps `npx github:microsoft/agentrc readiness` and hands off rendering to the @ai-readiness-reporter custom agent. Supports policies (--policy) for org-specific scoring. Use when asked to assess, audit, or score the AI readiness of a repo.'
+argument-hint: "[--policy <path-or-pkg>] [--per-area] — e.g. /acreadiness-assess, /acreadiness-assess --policy ./policies/strict.json"
+---
+
+# /acreadiness-assess — AI-readiness assessment
+
+Use this skill whenever the user asks for an **AI-readiness assessment**, a **readiness check**, an **audit**, or wants to **see how AI-ready** their repository is.
+
+This skill is the *Measure* step in AgentRC's **Measure → Generate → Maintain** loop. The result is a self-contained HTML dashboard the user can open with `file://` or commit to the repo.
+
+## Steps
+
+1. **Confirm prerequisites.** Node 20+ must be on PATH. If unsure, run `node --version`.
+
+2. **Decide on a policy** (optional but encouraged):
+   - If the user provided `--policy <source>`, capture it.
+   - Otherwise check `agentrc.config.json` for a `policies` array.
+   - If neither, run with no policy (built-in defaults).
+   - For a primer on policies, suggest the `acreadiness-policy` skill.
+
+3. **Run the readiness scan** in the repo root with structured output:
+   ```bash
+   npx -y github:microsoft/agentrc readiness --json [--policy <source>] [--per-area]
+   ```
+   The `CommandResult<T>` JSON envelope is your input for the next step.
+
+4. **Hand off to the `ai-readiness-reporter` custom agent** to interpret the JSON and produce `reports/index.html`. The agent renders via the bundled template `report-template.html` (shipped alongside this skill) so every report has an identical look & feel. The agent:
+   - Reads the bundled `report-template.html` and substitutes placeholders with real data.
+   - Inlines all CSS, ships a single static file (works under `file://`).
+   - Renders maturity level, overall score, grade, pass-rate vs threshold.
+   - Breaks down all 9 pillars across **Repo Health** (8) and **AI Setup** (1) with *what it measures*, *why it matters for AI*, *current state*, and *a specific recommendation*.
+   - Tags every pillar with an **AI relevance** badge (High / Medium / Low).
+   - Surfaces **Extras** separately (they never affect the score).
+   - Shows the **Active Policy** including any disabled/overridden criteria and thresholds.
+   - Produces a **Prioritised Remediation Plan** (🔴 Fix First / 🟡 Fix Next / 🔵 Plan).
+   - Embeds the raw AgentRC JSON for reuse.
+
+5. **Tell the user where the report lives** (`reports/index.html`) and how to open it. Summarise in chat: maturity level, overall score, top three lowest pillars, and the single highest-leverage next action (almost always: run the `acreadiness-generate-instructions` skill).
+
+## Notes
+
+- AgentRC also has a built-in HTML renderer (`--visual` / `--output report.html`) but its output is intentionally generic. This skill produces a tailored, opinionated dashboard via the custom agent — closer to a code review than a metrics dump.
+- For CI gating, recommend `agentrc readiness --fail-level <n>` (1–5).
+- The skill never modifies repository files other than creating `reports/index.html`.