# Context Harness

A browser-local context-design workbench by LockedIn Labs. It exports a user-authored Markdown or JSON design brief. Its deterministic completeness checks are not model evaluations, access verification, or a security certification.

- [Workbench](https://contextharness.ai/): synthetic starting examples and editable design fields.
- [About and privacy](https://contextharness.ai/about/): browser-local processing and check definitions.
- [What belongs in the first context window?](https://contextharness.ai/guides/design-the-first-context-window/): Give an agent a way to find the right evidence, and a clear reason to stop looking.
  Markdown: https://contextharness.ai/guides/design-the-first-context-window/index.md
- [Test the boundary before the demo](https://contextharness.ai/guides/test-the-boundary-before-the-demo/): A successful answer tells you less than a carefully chosen case the system must refuse, qualify, or hand back.
  Markdown: https://contextharness.ai/guides/test-the-boundary-before-the-demo/index.md
- [A handoff is more than a summary](https://contextharness.ai/guides/a-handoff-is-more-than-a-summary/): Leave enough information for the next session to resume the work without guessing about its current state.
  Markdown: https://contextharness.ai/guides/a-handoff-is-more-than-a-summary/index.md

Author: Sam M. Sweilem, https://sweilem.ai/sam-sweilem/
Canonical Person ID: https://sweilem.ai/#sam-m-sweilem
Publisher: LockedIn Labs, https://lockedinlabs.ai/
Published and reviewed: 2026-09-09