tessera-mcp 0.1.0

MCP server exposing Tessera memory to AI coding agents

tessera-mcp

MCP server exposing Tessera memory to AI coding agents (Claude Code, Codex).

Install / run

• With the SDK: pip install tessera-memory[mcp]
• MCP only (Python): pip install tessera-mcp then tessera-mcp
• MCP only (Node): npx tessera-mcp
• Zero-install: uvx --from tessera-mcp tessera-mcp

npm wrapper / uv bootstrap. npx tessera-mcp launches the Python server via uvx. If uv is not on your PATH the wrapper will not silently install it. It prints instructions and exits. To let the wrapper download and run the official uv installer (curl -LsSf https://astral.sh/uv/install.sh | sh, or the PowerShell equivalent on Windows), re-run with TESSERA_AUTO_INSTALL_UV=1. Alternatively install uv yourself from https://astral.sh/uv or use the Python install path above.

Configure (env)

• TESSERA_API_KEY — your Tessera API key (the tenant/isolation boundary)
• TESSERA_REPO — repo identity, used as the durable user_id (e.g. repo:my-app)
• TESSERA_SESSION — optional task/session id
• TESSERA_RECALL_ON_PROMPT — set 0 to disable per-prompt lesson recall (Claude Code)
• TESSERA_CONSOLIDATE_TRANSCRIPT — set 1 to enable the Claude Code SessionEnd transcript upload (default off). See the warning below.

Tools

Tool	Purpose
memory_recall(query)	composed memory context for the repo/task
memory_search(query)	raw hybrid search hits (no LLM)
memory_save_lesson(trigger, steps, success)	save a reusable lesson
memory_recall_lessons(situation)	recall lessons for a situation
memory_note(text)	record a durable repo convention

Editor setup

• Claude Code: install the plugin — /plugin marketplace add harshkedia177/tessera-python then /plugin install tessera-memory@tessera. Bundles the MCP server, session hooks, and the using-tessera-memory skill (see integrations/claude-code/).
• Codex: copy the [mcp_servers.tessera_memory] block into ~/.codex/config.toml and drop AGENTS.md + .agents/skills/using-tessera-memory/ into your repo (see integrations/codex/).

Privacy: the Claude Code SessionEnd hook ships your transcript

The Claude Code SessionEnd hook can upload the entire session transcript (every user + assistant turn) to the memory backend, keyed by repo, where it is later recalled and re-injected into future sessions. Coding transcripts routinely contain secrets (pasted API keys, printed .env files, credentials in command output). Because this upload is automatic, it bypasses the agent's "never store secrets" instruction.

For that reason it is opt-in and off by default:

• It runs only when TESSERA_CONSOLIDATE_TRANSCRIPT=1.
• When enabled, a redaction pass strips common secret shapes (KEY=/TOKEN=/ SECRET=/PASSWORD= assignments, sk-/tsk_/ghp_/xox tokens, AWS access keys, Authorization: headers, PEM private-key blocks) before upload.

Redaction is best-effort, not a guarantee — enable transcript consolidation only against a memory backend you trust with session contents.