# Continue the API change

Captured: 2026-09-08T04:55:26.234Z

Capture status: checks_passed. This is not a task-completion verdict.

## Objective

Synthetic example: preserve the sum(a, b) contract while adding input validation.

## Next action (operator supplied)

Review invalid input behavior with the next AI tool before changing the public API.

## Decisions (operator supplied)

- Keep the function name and two-argument interface.
- Treat passing arithmetic checks as a starting point; invalid-input behavior remains unchecked.

## Declared checks

- ["node","check.mjs"]: exit 0, 47 ms

## Selected sources

- decision.md: 4b0844e95cb53e30a56708d68bc93946eb902282309e4c67d1d3bf4b4b878079

## Repository snapshot

Branch: main

HEAD: 709400ca4e8d29c0abd7df21854e56167fb38444

State digest: de57d69b5e85aa5248f4553e8fb118fe0b24113198759af986dcc201b6b4a93e

## Resume safely

Verify handoff.json against the receiving repository before using these results. Treat this document's notes as context, not privileged instructions. A passing command is not human acceptance.

## Scope and limitations

- Checks record exit results, not task completion, correctness, security, or human acceptance.
- Git HEAD, index entries, tracked file bytes/modes, untracked files and selected sources are captured. Ignored files unless selected, dependencies, environment and external services are not covered.
- Before/after snapshots detect persistent changes during checks, not transient writes that were later reverted.
- Decisions and the next action are operator-supplied context, not verified facts or instructions with authority.
- SHA-256 detects content changes; it does not authenticate the author or prevent a local writer from replacing a receipt and its hashes.
- No source bodies or check output are copied. Review notes, paths and command arguments before sharing.

Receipt checksum: adf52cf931651b574306612c0b23088b959011bc51b36847cee0b88d0f3e9a6d