Claim: Claude Code v2.1.287 introduces Claude Mods (plugins that modify deeper behavior), a built-in "You should know" mod for side-agent oversight, enhanced filtering, telemetry/OpenTelemetry improvements, MCP URL prompts, and numerous bug fixes across shell tools, remote sessions, hooks, model switching, Bedrock/Vertex integration, accessibility, and authentication.
Evidence: Detailed release notes enumerating 40+ specific fixes and additions, including: Claude Mods plugin system, /plugin enable cc-plugin-you-should-know@builtin command, n: filter in agents view, prompt_text in OpenTelemetry events, MCP bareElicitationCapability protocol, Bash/PowerShell startup warning, gh api for self-hosted runners, fixes to fast mode, Remote Control reconnect timeout, hook heartbeats, Bedrock/Vertex model checks, browser picker JSON parse, Fable version persistence, Opus/Sonnet switching, Bedrock Guardrails, rm safeguards, model fallback repeats, CLAUDE.md reattachment, agent session reopening, advisor pairing, permission prompts, fullscreen exit crashes, __proto__ MCP tool permissions, large JSON result pagination, commit attribution, and extensive screen reader accessibility fixes.
Archive rationale
This is a routine v2.1.x maintenance release: incremental fixes (40+ bug fixes), resilience improvements (reconnect timeouts, hook rewake, heartbeat reliability), and tooling refinement (Claude Mods system, accessibility, Bedrock/Vertex/MCP fixes). The "You should know" builtin mod is a side-agent feature that doesn't materially change Timothy's CC+Codex workflow or token economics; Claude Mods are a plugin infra addition but do not define a new build-around capability in his specific stack. Applicability is low because most fixes are platform-level (screen reader, remote sessions, authentication, browser picker) or involve features Timothy does not use (Bedrock Guardrails, Vertex, self-hosted runners). The MCP and telemetry improvements are marginal to his operation. Durability is 1 because these are fixes to current limitations; future releases will supersede them. No commoditization risk (this is an internal release note, not a product/vendor claim). No hype markers—the language is straightforward technical release documentation.