GrayMatter v0.18.0

GrayMatter v0.18.0

Persistent memory for Go AI agents. Single binary. Zero infra.

Quick install

go install github.com/angelnicolasc/graymatter/cmd/graymatter@v0.18.0

Prebuilt binaries for Linux, macOS and Windows are in the assets below,
with checksums.txt (sha256). Per-platform download commands are in the
README.

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Added

• remember shared: <text> — the instant-save prefix reaches the project-wide namespace. remember: has always written to the cwd agent, so nothing typed in a prompt could reach __shared__: Claude Code could read project conventions but never create one, and the only way to file one was an MCP client that chose the namespace explicitly. The new prefix is checked before remember: (which it cannot collide with — remember carries a space where remember: carries a colon), matches case-insensitively like its sibling, and answers Saved to shared memory: <text>. remember: is unchanged.

Fixed

• The hooks never injected __shared__ — the documented path for project-wide conventions led to a silent hole. AGENTS.md tells every agent that project conventions belong in the reserved __shared__ namespace, and both automatic hooks ignored it: SessionStart and the UserPromptSubmit recall called Recall with the cwd agent only, so a convention archived there was invisible to Claude Code at session open and on every turn — with zero errors, zero warnings, empty stdout, the exact failure mode that reads as "memory is broken". Both runners now recall the shared namespace under its own budget (session-start top-5 agent + top-3 shared, per-turn top-3 + top-3) and render it as a labeled ## Shared memory (project-wide) section — separate budgets, because a merged ranking on session-start (where recency is the only ranked signal) would let old conventions displace the agent's freshest facts. The failure contract holds per namespace: one recall failing never costs the other's facts, the degraded injection still goes out, and the error lands in hooks.log. The identical-block throttle keeps working on merged blocks, and graymatter status's INJECTION line now estimates the block the hooks actually inject instead of a generic top-8.

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