Prism Coder
Give your AI agent memory that lasts — and see the cloud tokens it never had to spend. Persistent sessions, knowledge graphs, offline tool-routing, and an auditable savings meter. Fully local and free.
Prism Coder is an MCP server that gives Claude, Cursor, and other AI tools long-term memory that survives across sessions. It ships with the open-weight prism-coder model fleet (2B–27B) for fast, offline tool-routing — no cloud required. And it keeps score: every call served locally is metered, so prism savings shows the token volume that never reached your cloud model — measured honestly, in tokens.
No account needed. No API keys. Runs on your machine.
A paid subscription adds cloud sync, higher model tiers, and team features through the Synalux portal.
What Prism gives you
- Session memory that survives restarts — resume projects with handoff notes, recent work, open TODOs, and configurable quick, standard, or deep context.
- Local-first inference — bounded work is routed through local Ollama models first, with automatic 2B/4B/9B/27B selection based on installed models, available RAM, context fit, and subscription entitlements.
- A savings meter you can audit —
prism savings(or thelocal_savingstool from any host) reports the token volume local serving kept off your cloud model: headline, local share, per-model breakdown. It reports tokens, never an invented dollar figure, and prints its assumptions and known undercounts inline — a number you can check, not marketing. - Route-output enforcement — route mode returns only well-formed calls to
tools the host actually advertised. Standard and higher plans can add
authenticated deterministic correction;
route_guard: "local"disables that correction only.cloud_fallback: falseforbids cloud inference fallback andverify: false(with noevidence) disables the grounding verifier. With all three off, no request carries your prompt, draft or evidence; the per-call entitlement check and telemetry still contact the portal and carry neither. - One setup for every agent —
prism connectconfigures Claude Code, Claude Desktop, Cursor, Gemini CLI, and Codex while preserving unrelated settings. - Subscription-aware skills — entitled skills are synchronized before the host launches, with safe upgrades, downgrades, conflict preservation, and offline last-good recovery.
- Hook-free startup — MCP metadata and native instructions request Prism's
startup context without requiring lifecycle hooks or a Prism-owned launcher.
Where a host offers hooks (Claude Code, Codex),
prism connectadds two small ones on top: mid-session prompt routing, and a post-compaction re-injection of the protected-floor digest. - Prompt-triggered Factory — enabled by default for suitable bounded
implementation requests with explicit files, an allowed write list, and a
verification command. The host starts and monitors the recommended pipeline;
BCBA requests stay with the host. A dashboard toggle or
PRISM_DARK_FACTORY_ENABLED=falsedisables Factory after an MCP restart. Try the three-test filename fix. - Safe escalation and observability — inference outcomes are explicit, reserved text remains fail-closed (clinical images are processed locally, never sent to the cloud), and local/cloud usage is recorded for review.
