fix: add Cursor/Codex adapters + align version strings to 4.9.0

[r2st]

Summary

• Adds Cursor adapter (.cursor/rules/co-dialectic.mdc) and Codex adapter (AGENTS.md) with install support via --target cursor|codex|all
• Fixes 6 stale version strings (3.0.0, 4.2.0, 4.7.0, 4.8.0) across SKILL-lite.md, SKILL.md, plugin.json, marketplace.json, and install.ps1 — all now aligned to canonical 4.9.0
• Adds CLAUDE-ISSUES.md audit log documenting all findings and fixes

Test plan

• bash test-plugin.sh passes 57/57 (includes Cursor fallback + Codex adapter path checks)
• bash install.sh --target cursor creates byte-identical .mdc in .cursor/rules/
• bash install.sh --target codex creates byte-identical AGENTS.md
• Codex CLI reads AGENTS.md and lists codi commands
• Re-running --target codex updates the existing block (idempotent, no duplication)
• Version strings consistent: grep -r 'v[0-9]\+\.[0-9]\+\.[0-9]\+' --include='*.json' --include='*.ps1' shows only 4.9.0

🤖 Generated with Claude Code

[thewhyman]

Thanks for this — the adapter additions are solid work. One required fix before merge, then this is good to go.

Required: .gitignore — anchor the AGENTS.md pattern

The problem: The new AGENTS.md entry in .gitignore is unanchored. Git pattern AGENTS.md matches that filename anywhere in the repo tree — including plugins/co-dialectic/adapters/codex/AGENTS.md (the Codex adapter you are adding in this same PR).

The current PR works because the file was force-added with git add, but any future contributor who tries git add plugins/co-dialectic/adapters/codex/AGENTS.md normally will silently fail to track it. The file disappears from git status and they will have no idea why.

The fix (one character):

-AGENTS.md
+/AGENTS.md

/AGENTS.md anchors the pattern to the repo root only — which is the intent (ignore Claude Code auto-generated root-level AGENTS.md, not adapter files nested in the plugin tree).

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Everything else is ✅

Cursor adapter — alwaysApply: true + Cruise default + quiet status metadata is exactly the right UX for the Cursor surface. Invisible prompt improvement with no Drive-mode friction.

Codex adapter — Lightweight, no persona system, engineering discipline only. Correct call — Codex is a coding agent, the persona stack would be noise there.

Version strings — All five locations aligned to 4.9.0 (SKILL.md, SKILL-lite.md, plugin.json, marketplace.json, install.ps1). Clean.

--target auto flag — Smart default for the install scripts.

Pre-merge 404 on raw main URL for the .mdc file is expected and self-resolves on merge. Not a blocker.

Fix the .gitignore anchor and this is ready to merge.