[sheldonxxxx]

Problem and result

The persistent MCP skill client exits after recoverable rejected requests, forcing a reconnect before the next edit. It now keeps reading after schema validation and the known pre-execution errors INVALID_ARGUMENT, REVISION_CONFLICT, JOB_BUSY, and MODEL_NOT_INSTALLED.

Other MCP result errors still stop queued edits by default. --continue-on-error permits continuing when each request is sent and inspected individually; transport failures and timeouts always stop the client.

Type of Change

• Bug fix
• Breaking change
• Documentation update

Changes

• Replace --on-rejected with default rejection handling and the --continue-on-error override. Existing launch commands using --on-rejected must be updated.
• Keep rejection messages distinct from errors that may require state inspection.
• Update regression coverage and connection guidance.
• Refine the skill's masking and measurement instructions with conservative defaults and gradient/gap guidance; native tool capabilities are unchanged.

Testing

The following passed on the PR branch against dev:

• npm run format:check, npm run typecheck, npm run lint, and npm run i18n:check.
• npm test: 133 frontend tests.
• npm test --prefix mcp: 149 MCP tests, including continued schema rejection, stopping on native errors, explicit error continuation, and transport handling.
• Commit whitespace checks.

Test Configuration:

• OS and architecture: macOS 27.0, arm64; Node 26.9.0.
• GPU / processing backend: Not used by the client tests.
• Affected entry point: MCP skill stdio client.
• MCP host and native build: TypeScript host built by the test command; error-handling tests use a controlled test engine. These tests do not claim native photographic acceptance.

Checklist

• Code follows the project's style and checks pass without warnings.
• No unnecessary AI-generated code comments were added.
• README/setup claims remain accurate and behaviour changes are recorded under Unreleased in CHANGELOG.md.
• Shared files and links contain no credentials, personal paths, or unavailable local evidence.

AI assistance

Prepared with Codex assistance. The diff and local checks were reviewed, and a separate product manager reviewed the public guidance and messaging.