v2.3.0

Added

• The Open-CMSIS-Pack/cmsis-agent skills ship in the extension, opt-in. The 21 skills of cmsis-agent (project setup, device debug/trace knowledge, CMSIS-Pack debug authoring) are vendored verbatim under skills/cmsis-agent/ at a commit pinned in skills/cmsis-agent.lock.json (npm run skills:sync; upstream has no tags or releases), listed in a generated skills/catalog.json, and installed only when selected — the new setting cmsis-developer-assistant.installedSkills (application scope, default ["cmsis-debug-live"]) holds the picks, the new command Select Agent Skills (also step 2 of the first-run setup) edits them. The selection is applied on activation and whenever the setting changes, so it follows Settings Sync.
• One slash command per category instead of 21. Generated router skills cmsis-project, cmsis-bring-up and cmsis-pack dispatch to their member skills; picking a router installs the members with user-invocable: false, which keeps them out of the / menu in Claude Code, VS Code and Copilot CLI while the model can still invoke them by description. The $name cross-references in each skill are recorded as dependencies and installed (hidden) alongside whatever is picked, so a skill never arrives without the skills it hands over to.
• Skills are now written to ~/.claude/skills/ as well, when a Claude home exists — Claude Code reads only its own directory, not ~/.agents/skills/, so earlier releases' skill was invisible to it. $COPILOT_HOME/skills/ is written only when that variable is set (the Copilot CLI then ignores ~/.agents/skills); the unconditional ~/.copilot/skills/ copy is no longer written and the old one is cleaned up.
• Skill directories are marked and replaced, not merged. Every directory the extension installs carries .cmsis-developer-assistant.json; only marked directories (or the pre-marker cmsis-debug-live) are ever replaced or removed, a user's own skill of the same name is left alone and reported, and a re-sync replaces the directory so files dropped from the bundle do not linger. src/test/skillCatalog.test.ts pins the catalog to the directories on disk and the lock's content hash; src/test/skillInstaller.test.ts covers the marker rules in temp directories.
• MCP instructions at initialize. The server now tells clients up front that these tools drive a live Cortex-M session and that a runtime investigation should start by invoking the cmsis-debug-live Agent Skill — target awareness, the session-status gate, breakpoint strategy, step-and-inspect, fault decode, root cause — or get_debug_instructions in harnesses that do not load skills. start_debugging says the same in one sentence. (Upstream #129.)
• Debugger-first rule in the skill and in the get_debug_instructions guide. Do not start a runtime investigation by adding printf over UART/ITM, LED toggles or trace macros — on a Cortex-M that is a rebuild, a reflash and a reset per hypothesis, and it moves the timing you are observing. Halt and inspect instead; reach for add_logpoint only knowing it still stops the core per hit. The skill description gained the trigger vocabulary (runtime bugs, faults, crashes, hangs, failing tests, wrong/null values, unexpected output) so skill-aware harnesses pick it for the right prompts. (Upstream #129.)
• Contract tests for that guidance (src/test/debugSkillGuidance.test.ts): the trigger words, the debugger-first wording, and that the skill, the MCP instructions and the instructions guide stay consistent. (Upstream #130.)
• Opt-in live trigger evaluation, npm run test:skill-trigger-agent: runs a real Copilot CLI session in a scratch worktree carrying only the skill, with an embedded prompt, and asserts cmsis-debug-live is its first tool call. Deliberately outside npm test — needs an authenticated Copilot CLI, spends credits, and a model's first move is not deterministic. (Upstream #130.)

Changed

• Commands consolidated. Configure Agents and Skills (cmsis-developer-assistant.configure) runs the two-step flow — agents, then skills — that the first-run prompt shows; Select Agent Skills runs step 2 alone. Show Agent Selection Popup and Configure Agents are removed; Reset Popup State stays but is hidden from the palette. The first-run flag moved to popupShown.v3 so existing users see the skills step once.
• scripts/** no longer ships in the VSIX.

Fixed

• The first-run agent setup picker came back on every activation until something was selected. Dismissing it (Esc, focus loss) now counts as an answer; manual setup stays available via Configure Agents and Skills. (Upstream #115.)

Full changelog: https://github.com/MatthiasHertelArm/CMSIS-Developer-Assistant/blob/v2.3.0/CHANGELOG.md