arch-auditlisted

## Step 1 - Fetch latest Anthropic documentation > **Parallelism**: Steps 1 and 2 have no data dependency. Launch the Step 1 research agent first (async), then begin Step 2 file reads in the main context immediately - do not wait for the agent to complete before reading local files. Launch a single research agent **(model: haiku)** to fetch ALL of the following URLs and extract key changes: - https://code.claude.com/docs/en/memory - https://code.claude.com/docs/en/settings - https://code.claude.com/docs/en/hooks - https://code.claude.com/docs/en/mcp - https://code.claude.com/docs/en/sub-agents - https://code.claude.com/docs/en/slash-commands - https://code.claude.com/docs/en/release-notes/overview - https://github.com/anthropics/claude-code/releases (latest 5 releases) - https://docs.anthropic.com/en/docs/about-claude/models (latest model IDs and deprecation notices) - https://code.claude.com/docs/en/best-practices From each Claude Code source extract: new keys/features, deprecations, breaking changes, best practice updates. From the models page extract: current model IDs for Opus/Sonnet/Haiku, any deprecation dates announced. From the prompting guide sources extract: principles for system prompt design, instruction clarity, context management, and what Anthropic explicitly discourages in long instruction files. **URL resilience**: if any URL returns 404, try the canonical base `https://code.claude.com/docs/en/` to locate the current path. Note in the report if a URL cha