v2.1.0 — Typed updates. Verified saves.

22 tools. Live writable fields. Typed changes. Verified saves.

• Discover the fields exposed by current authenticated edit forms, with question labels and required flags.
• Prepare exact text changes with before/after diffs, expected-value checks and financial protection by default.
• Recheck current answers and permissions before dispatch. The generic commit tool honors the same guard.
• Automatically read back typed updates; a successful response whose values do not match returns a postcondition error without resending.
• Compare expected answers independently and export private Markdown to your MCP host without writing files.
• Install the desktop MCPB with production dependencies included, official schema validation, a SHA-256, and a tested extracted CLI.

Verified: 51 core regressions, intercepted Chromium integration, fresh production-only package installation, desktop bundle extraction/handshake, zero known dependency vulnerabilities, and live read-only account checks with zero mutations. Hosted CI passes Node 22, 24 and 26 plus browser and bundle jobs.

The registry workflow will attach the .mcpb, exact server.json and bundle checksum to this release. Download those artifacts from this page for compatible desktop hosts. See bundle setup.

Concurrency checks are best-effort: YC does not provide atomic compare-and-swap. Receipt success and read-back verification are distinct. No automatic mutation retries are introduced. Existing 17 tool names and receipt histories remain supported.

Tool contract · Operations · Registry publication

Unofficial YC client. Credentials and application records remain local and are excluded from all distribution artifacts.

v2.0.0 — Your YC app. Your AI workflow.

Bring your own signed-in YC account to your MCP client. Read application answers, review exact changes, commit once, and verify what actually persisted.

• 17 tools: account/application/profile reads, GraphQL discovery, a named-operation registry, resources and prompts.
• Direct HTTP: manual browser sign-in captures a private local session; normal API requests run from Node.
• Durable changes: immutable previews, final session checks, fsynced receipts and no automatic mutation retries. HTTP 200 alone never proves a save.
• Operational checks: cookie rotation, bounded streams/deadlines, crash recovery, diagnostics and production-only package verification.
• Distributed branding: new copper launch artwork using the supplied slanted wordmark, plus the workflow diagram.

Node 22.13+; verified locally on Node 22, 24 and 26. The isolated Chromium test intercepts all HTTP. A separate authenticated smoke test read application/profile data with mutations disabled and sent zero mutations.

Download the built .tgz and SHA256SUMS, or clone the repository and follow the quick start. No local sessions, application records or account-specific administration scripts are included.

Migration: version 1 receipts are preserved for deduplication. Legacy succeeded entries confirmed only an envelope; replay reports MUTATION_UNVERIFIED without resending. Read back historical changes before further edits.

Operations and recovery · Contract · Launch copy

MIT code. Unofficial YC client; YC controls upstream access and edit permissions. Distributed Systems brand assets do not grant trademark rights.