Resume any AI session without losing your decisions, constraints, or direction.

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Portable, git-backed project-state for long-running AI work — in Claude Code, Cursor, or anything that speaks MCP.

It is not a memory tool. A memory tool answers "what did we talk about?" Continuity answers a different question: "what is true about this project now, and what must not be touched?"

Why it's built this way

• State lives as plain markdown files, tracked by git. Git is the event log: history = git log, rollback = git revert, audit = git blame. Every claim is human-readable, diffable, and hand-editable. You review what the AI captured the same way you review generated code — as a diff, whenever you want. There is no approval gate at capture time.
• Two storage modes, one API. Repo mode (<repo>/.continuity/, found by walking up from the working dir) suits editor/agent tools with a project cwd like Claude Code. Central mode (~/.continuity/projects/<name>/, named projects) suits tools with no project cwd like Claude Desktop — you just refer to a project by name.
• The resume context is a deterministic projection of those files (no LLM in the read path) — frozen constraints, active decisions with the reasons they superseded older ones, rejected paths you shouldn't re-propose, open questions, and the next step.
• Trust comes from honesty, not blind faith. Every claim carries confidence + provenance, so a fresh session knows what's confirmed vs. AI-inferred and calibrates instead of trusting everything.

See DESIGN.md for the full architecture and poc/ for the validation that motivated it.

Install (as a Claude plugin)

Continuity is a Claude Code plugin, distributed as its own plugin marketplace — this repo is the marketplace. It runs everywhere Claude Code runs: the terminal, the desktop app, and web. In Claude Code:

/plugin marketplace add vikcena01/ai-continuity-plugin
/plugin install continuity@continuity-marketplace

That's it — the bundled MCP server, the continuity skill (auto-resume + auto-capture), the SessionStart hook, and the /resume /freeze /why commands all install together. dist/ is committed and dependency-free, so there's no build step on install.

Local development

npm install
npm run build   # typecheck + bundle to dist/
npm test        # build + 186 assertions across ten suites

The loop (CLI)

continuity init "Build Snip, an internal URL shortener"
continuity record-decision "PostgreSQL is the source of truth" --body "ops knows it; volume is modest"
continuity reject "DynamoDB as primary store" --reason "KV overhead unjustified at our volume"
continuity record-constraint "Short codes are exactly 7-char base62" --body "printed in marketing + partner contract"
continuity freeze "7-char base62"     # lock an invariant — fuzzy: id OR title substring
continuity resume                     # <- the compact state a new session gets
continuity why "301"                  # <- what a decision replaced, and why
continuity resolve "8-char codes" --reject --reason "separate namespace"
continuity mission "..." --reason "why it changed"   # replacing one needs a reason
continuity list --query "base62"      # search id, title AND body
continuity list                       # ids are short: d1k3, c2m9, x1p4, ...
continuity log                        # the git-backed event log

Claims get short, typeable ids — a type prefix, a sequence number, and a two-char suffix: d1k3, c2m9, x1p4. The suffix is what makes concurrent work safe: without it, two developers who each record the 16th decision both write claims/d16.md and collide on merge. freeze / why / supersede / resolve accept an id or a title substring. State is written under claims/ and auto-committed to git on every change — but never auto-pushed, so resume warns you when captured commits are sitting unpushed.

Closing a claim

resolve is the only way a claim reaches a terminal status, and the reason is mandatory — a claim that just disappears teaches the next session nothing:

continuity resolve <id-or-text> --accept --reason "..."   # a parked conflict wins
continuity resolve <id-or-text> --reject --reason "..."   # it becomes a guardrail
continuity resolve <id-or-text> --close  --reason "..."   # a settled risk/question

Accepting a claim parked against a frozen one additionally requires --unfreeze. Freezing is the single human act in the model, so overriding it has to be a second deliberate one.

Use it in Claude Desktop (MCP)

Any host that speaks MCP but has no project cwd can use the MCP server with named projects. (Note: the Claude desktop app runs Claude Code inside it, so the full plugin — hooks, commands, skill — works there; this path is for plain-MCP hosts.) Build (npm run build), then add to claude_desktop_config.json:

{
  "mcpServers": {
    "continuity": {
      "command": "node",
      "args": ["/absolute/path/to/ai-continuity-plugin/dist/mcp.js"],
      "env": { "CONTINUITY_HOME": "/Users/you/.continuity/projects" }
    }
  }
}

Then in chat: "create a continuity project called snip" → create_project; "resume snip" → resume_context; the model records decisions/constraints/rejections as you go. A user-invokable resume prompt is the Desktop substitute for Claude Code's auto-resume hook. Tools: list_projects, create_project, resume_context, search_claims, record_decision, record_constraint, record_rejection, record_open, record_mission, capture, resolve_claim, freeze_claim, why.

As a Claude Code plugin (bonus)

This repo is also a Claude Code plugin (manifest at .claude-plugin/plugin.json). There, on top of the MCP server, you get things Claude Desktop can't do:

• a SessionStart hook (hooks/hooks.json) that auto-injects resume_context on new / resumed / post-compact sessions — you never have to ask;
• a Stop hook that runs an end-of-turn capture check, so decisions get recorded without anyone remembering to ask. Two independent guards (stop_hook_active plus a time throttle) make a loop impossible;
• slash commands /resume, /freeze, /why.

The repo also ships .claude/settings.json, which registers the same hooks against its own committed dist/. A collaborator who just runs git clone therefore gets auto-resume and auto-capture without installing anything. Both hooks de-duplicate per session, so having the plugin installed and cloning the repo is harmless.

Claim format

Each .continuity/claims/<id>.md:

---
id: d4k7
type: decision            # decision | constraint | rejected_alternative | mission | milestone | question | next_action | ...
status: accepted          # accepted | frozen | superseded | rejected | open | needs_review | resolved | done
resolution:               # set by `resolve`: why this claim was closed
confidence: confirmed     # confirmed | tentative | unverified
provenance:
  origin: manual
  created: 2026-08-04T00:00:00.000Z
supersedes: []
superseded_by: null
depends_on: []
tags: []
---
Postgres is the primary datastore; a Redis read cache may come later.

The claim format (a contract)

Once anyone else's repo holds claims, the file format is a contract — so it carries a version:

---
schema: 1              # absent means 1
id: d16k3              # <type prefix><n><2-char suffix>; the suffix keeps concurrent clones from colliding
type: decision         # mission requirement decision constraint architecture milestone
                       # hypothesis experiment risk question next_action rejected_alternative
title: One crisp fact
status: accepted       # accepted active frozen open superseded invalidated rejected
                       # needs_review completed done resolved
confidence: confirmed  # unverified tentative confirmed
provenance: { origin: auto, created: ... }
supersedes: []
superseded_by: null
superseded_reason: ""  # why the replacement happened — travels with the claim
resolution: ""         # why it was closed, set by `continuity resolve`
---

Prose body. The reason, the context, whatever a future session needs.

Stability promise. A claim written by an older Continuity always reads: absent schema means 1, and older shapes migrate forward in memory without rewriting your files. A claim written by a newer Continuity is refused by name, loudly, rather than half-parsed — guessing at a shape we do not understand is how state degrades silently. continuity migrate rewrites files at the current schema when you want the version explicit on disk.

Reviewing what was captured

Capture is autonomous, so the safeguard is that you can see what it wrote:

continuity review            # semantic diff: what appeared, changed status, or was edited — and why
continuity review --accept   # mark it reviewed

It catches hand edits as well as tool writes, and the resume context tells you when changes are waiting.

Changelog

See CHANGELOG.md. Claim-file schema has remained 1 across every release.

Status

v1.4 — deterministic core + CLI + MCP server + Claude Code plugin. Versioned claim files, collision-safe ids, fuzzy lookup, a budgeted resume projection, git-backed event log, and 186 assertions across ten suites (npm test).

Working today:

• Autonomous capture, driven by a Stop hook at the end of each turn — not by the model remembering to.
• A reconciler behind every batch capture: dedupe, lineage-preserving supersession, and a frozen-guard that parks anything contradicting a frozen claim as needs_review instead of applying it.
• A resolve verb to close what the reconciler parks, and to close risks/questions once they are settled.

Known limits, tracked as claims in this repo's own .continuity/: the Stop-hook capture check is throttled to at most once per 10s, so a decision settled in a very fast exchange can still be missed (q3); and reliable status extraction from messy sessions remains the open technical risk (q2).

Listed on

The mark

A C drawn as one unbroken arc — the thread that survives between sessions — terminating in a node, a single captured claim. assets/icon.svg is the same mark on a rounded tile for an avatar or favicon; assets/logo-light.svg and assets/logo-dark.svg are the wordmark lockups, picked by prefers-color-scheme so both GitHub themes work.

License

MIT — see LICENSE. Copyright (c) 2026 Vikash.