Writing
Claude Code plugin
Treeship and Claude Code plugin, by Anthropic.
Receipts for agentic commerce
Anthropic's Claude Commerce Agents blueprint tells an agent what it may do in a store. Visa, Mastercard and Google are deciding how an agent may pay. Nobody in that stack keeps a record a stranger can check. Checked against a fresh clone.
You can't have agentic commerce without tamper-proof receipts
Anthropic's commerce-agents reference enforces its gates in code and leaves the record to the deployment. treeship-commerce is that record: every tool call signed on all three runtimes, the merchant's approval as a single-use grant, and a receipt for exactly the cart that went to checkout. Verifiable offline, wired by one command.
Treeship 0.27: the custody handshake
Foreign work handed over A2A or MCP is refused until the other agent proves live key control, and the handoff receipt records that it did.
Treeship 0.24: trusted rooms end to end
A room is a session whose participant set grows by signed invitation. 0.24 signs the room into the receipt, derives the roster from evidence, and adds a liveness challenge on join.
Treeship 0.19: the security-hardening release
Two adversarial audits, every confirmed finding in the default binary fixed with a regression test, and a receipt export any Ed25519 library can verify.
Treeship 0.18: onboard once, present anywhere
Signed work history, certificate chains to the ship, offline presentations with a challenge handshake, and a checkpoint-pinned track record.
Treeship 0.11: agent invitations
A second agent can join a session through a signed, single-use, expiring invitation that the host countersigns. Plus a local dashboard, a feature inventory, and new skills.
Treeship 0.9.6: the trust fabric
Three-layer file capture, tool usage checked against the agent certificate, and scoped approvals. A receipt can now say whether the agent stayed inside its bounds.
Treeship 0.9: the official Claude Code plugin
Two commands install a plugin whose hooks record every Claude Code session into a sealed receipt. TREESHIP.md tells the agent exactly what is captured.