install: Qwen Code hooks + MCP connector

[davidcrowe]

Adds Qwen Code (QwenLM/qwen-code, ~27.6k stars, ~85k npm downloads/week) as a hooked client.

• Detects ~/.qwen or qwen on PATH.
• Merges PreToolUse / PostToolUse entries into ~/.qwen/settings.json calling the shared govern.mjs with ACP_CLIENT=qwen-code. Qwen's hook contract is Claude Code's (same stdin fields, hookSpecificOutput.permissionDecision, exit 2 blocks); two deltas handled: timeout is milliseconds (5000), matcher * = every tool.
• Registers the ACP MCP connector under mcpServers in the same file; warns if disableAllHooks is set.
• Target list, client slug, nothing-detected gate, restart hint, README.

Verified 2026-09-03 with the same settings shape inside a fresh Linux container (Harbor, Qwen Code 0.23.0): hook fired on the first tool call, session recorded under client qwen-code in the runs API. Pages: agenticcontrolplane.com PR #133.

[davidcrowe]

⚠️ Do not merge this as-is — it would regress the Codex one-line install.

This branch is cut from a pre-09-03 base, so beyond the Qwen additions its diff against current main also:

• deletes the codex-acp launcher and the [model_providers.acp] block
• deletes the shared acp-session-summary and moves the PATH block back inside the Claude Code branch
• reverts POSIX > /dev/null 2>&1 to the bashism &> /dev/null in 16 places

The red install.sh sync check is therefore correct twice over: canonical lives in the marketing repo, and this copy is behind it.

The six genuinely-Qwen hunks have been re-applied on top of current canonical in davidcrowe/agenticcontrolplane.com#145 (+75/−1, dash -n clean, merge logic tested for idempotency and for preserving a user's existing hooks and MCP servers).

Suggested order: merge and deploy #145 → resync this mirror from canonical → close this PR rather than merging it, since its content is by then either landed or a regression.

[davidcrowe]

Correction to the comment above. It said merging this PR would revert the codex-acp work. That was wrong — it was read off git diff origin/main <pr-head>, which compares two heads on different bases, not what a merge produces. A trial 3-way merge (git merge-tree --write-tree origin/main <pr-head>) is clean and keeps codex-acp, [model_providers.acp] and acp-session-summary intact.

What is actually true about this PR:

• The red install.sh sync check is correct: canonical install.sh lives in the marketing repo and does not carry the Qwen block yet. The mirror has to follow canonical, not lead it.
• The new Qwen detection line uses &> /dev/null, a bashism the POSIX pass on main already purged everywhere else — it would be the one &> left in the file.

The Qwen hunks are re-applied on current canonical in davidcrowe/agenticcontrolplane.com#145 (POSIX-clean). Suggested order is unchanged: merge + deploy #145 → resync this mirror from canonical → close this PR, since by then its content is landed.