Tethr
A shared planning workspace for people and their existing AI agents. Versioned sections, reviewable proposals, and human-approved releases keep everyone working from the same plan. In private alpha.

One plan. Built together.
People contribute intent and constraints; connected agents bring back what implementation reveals. In the private alpha, an authorized agent proposes a section update against the version it read. A person reviews the source, rationale, and exact diff before accepting or rejecting it. Accepted sections form an immutable named release. Tethr runs no LLM of its own: it holds the shared plan and the record of who approved each change. Reusable skills and CLI hooks are planned, not current alpha features.
04 / Technologies & context
- Private alpha
- AI Agents
- Collaboration
- Human-in-the-loop
Propose. Review. Release.
A proposal is not the current plan. A named person reviews the exact change before it becomes part of a sealed release.
Visit websiteInside the project
Implementation
The private alpha connects authorized external agents through supported MCP clients. Proposals preserve their source, rationale, base version, and exact diff. A named person accepts or rejects the change; the release retains the approval record. Tethr itself runs no LLM.
The workflow
- Create structured plan sections
- Review an agent proposal against its base version
- Seal accepted changes into a named release
Scope & status
Private alpha, not a general-purpose agent harness. Reusable skills, CLI alignment hooks, and broader evidence loops are marked as planned or directional on the product site.
Public references
Plan v1
Plan v2
Plan v3
Agents propose. People retain the release decision.
Illustrative concept

