Tages

Team memory for AI coding agents.

Your AI agents forget everything between sessions. Every decision re-litigated. Every convention re-explained. Every past mistake repeated by the next agent that touches the same code.

Personal memory tools patch the symptom: store some facts, retrieve them later. That works for solo developers who remember what they stored. It breaks down when teams ship with AI — when three developers are using agents on the same codebase, when onboarding requires transferring institutional knowledge, when the wrong memory survives a refactor because no one audited it.

Memory isn't storage. It's a team practice.

Tages treats codebase memory as a managed artifact: structured types, quality scoring, audit trails, sharpen passes that rewrite vague notes into imperative agent instructions. One developer's architecture decision becomes every agent's context. A bad memory gets flagged and corrected before it misleads the next session.

Start in under 60 seconds with one command. Add team features when your workflow demands them.

claude mcp add tages -- npx -y @tages/server

Why Tages?

	Tages	Zep	Mem0
Install	One line (claude mcp add)	Docker + API key	API key + SDK
Local-only mode	Yes (SQLite, zero config)	Self-hosted only	No (cloud-only)
Team sharing	Yes (RBAC, federation)	Yes (cloud)	No
Dashboard	Yes (Next.js, analytics)	Yes	Basic
Quality control	Audit, sharpen, enforce	No	No
Memory types	11 structured types	Knowledge graph (Graphiti)	Structured
MCP tools	56	N/A	N/A
Search	Trigram + semantic + decay	Temporal knowledge graph	Vector
Workflow integration	Git hooks, CI/CD, briefs	SDK calls	SDK calls
Pricing	Free local / $14 Pro	Open-source / Cloud	$19-$249/mo

What It Remembers

Source code tells agents what exists. Tages tells them why it was built, how to work with it, and what not to do.

Type	Example
Convention	"Always use snake_case for API routes"
Decision	"Chose Postgres over MongoDB for pg_trgm fuzzy search"
Architecture	"Auth middleware in lib/auth.ts, JWT in httpOnly cookies"
Lesson	"Don't cache the Supabase mock — tests need fresh state"
Anti-pattern	"Never pass id in upsert with onConflict — causes FK violation"
Pattern	"All API errors return { error, code, status }"

Plus: entity, execution, operational, environment, preference (11 types total).

How It Works

1. Install — tages init connects to your project, or install the Claude Code plugin for zero-config setup
2. Remember — Store decisions and conventions manually, via git hooks, or by importing CLAUDE.md
3. Recall — Every session gets full project context in <10ms from local SQLite cache

Zero-Config Auto-Detection

When running as a Claude Code plugin or MCP server, Tages automatically detects which project you're in:

1. .tages/config.json — explicit marker file (created by tages link)
2. Git remote — matches the repo name against registered projects
3. Directory name — matches the folder name against registered project slugs
4. Auto-create — if authenticated, creates a new cloud project automatically; otherwise uses local-only mode

No tages init required per directory. Use tages link [slug] to explicitly bind a directory to a project.

Claude Code Plugin

Install Tages as a Claude Code plugin for automatic session memory:

/plugin https://github.com/ryantlee25-droid/tages

Works With

Claude Code, Cursor, Codex, Gemini — anything that speaks MCP.

Features

• 56 MCP tools — remember, recall, audit, sharpen, import, federation, analytics, and more
• 53 CLI commands — full control from the terminal
• Web dashboard — browse, search, and edit memories with dark-mode UI
• Auto-indexing — git hooks extract decisions from commits via Ollama or Claude Haiku
• Import — seed from existing CLAUDE.md, ARCHITECTURE.md, or JSON files
• tages brief — generate a cached context document for system prompt injection
• tages audit — score your memory coverage and get suggestions for improvement
• tages sharpen — rewrite memories into imperative form for better agent consumption
• Local-first — SQLite cache for sub-10ms queries, works offline
• Hybrid search — pg_trgm trigram matching + pgvector semantic search
• Team sharing — multiple developers share one codebase memory (Pro)

Benchmarks

Reproducible LongMemEval and coding-memory benchmark results are published under eval/ with full methodology, judge configuration, and run notebooks. Results are reproducible against the published harness; raw numbers are in each eval's results/ directory.

Setup Guides

• Quickstart
• Claude Code
• Cursor
• Codex
• Gemini
• GitHub Actions
• Self-Hosting

Architecture

packages/
  server/     MCP server (56 tools, stdio transport, 605 tests)
  cli/        CLI (53 commands, npm global install, 163 tests)
  shared/     TypeScript types + Supabase client
apps/
  dashboard/  Next.js 16, Supabase Auth, Tailwind, shadcn/ui
supabase/
  migrations/ 56 migrations (tables, RLS, pgvector, RBAC, encryption)

Security

• Encryption at rest — AES-256-GCM for memory values (opt-in)
• RBAC — Owner/admin write, member read-only
• Row Level Security — All tables enforce project membership at the database layer
• Auth — Supabase Auth + GitHub OAuth; API tokens SHA-256 hashed with expiration
• Secret detection — Memories scanned for API keys, credentials, PII before storage
• Audit logging — Auth events, exports, and token validation tracked

See SECURITY.md for our full security policy and responsible disclosure process. See PRIVACY.md for our privacy policy.

Pricing

Plan	Price	Includes
Free	$0	1 project (cloud sync), 10,000 memories, 20 core MCP tools, local SQLite
Pro	$14/mo	Up to 10 projects, 50K memories, all 56 tools, cloud sync
Team	$19/seat/mo	Up to 20 projects, 100K memories, federation, RBAC, audit logging
Self-hosted	Free forever	Bring your own Supabase, no limits, MIT license

Contributing

See CONTRIBUTING.md for development setup and guidelines.

Release Notes

2026-04-29 — Week 1 housekeeping (governance unghost, action-setup v6, drop provenance user_id)

• A1 — Governance page indexed: removed robots: 'noindex, nofollow' from /governance metadata. The page is now crawlable and eligible for Google Search Console indexing. Added /governance link to both the desktop nav (after Security, before GitHub) and the mobile menu using the same styling as adjacent links.
• A4 follow-up — publish.yml pnpm/action-setup aligned to v6: bumped pnpm/action-setup@v5 to @v6 in .github/workflows/publish.yml. PR #31 (Dependabot) is bringing ci.yml to v6; without this bump publish.yml would be left on v5 — functional but inconsistent and easy to forget before the v0.3.1 tag push.
• B1 — get_memory_provenance no longer returns raw auth.users UUID (migration 0058): create or replace function in supabase/migrations/0058_drop_provenance_user_id.sql removes the user_id uuid column from the function's returns table(...) and the corresponding m.updated_by as user_id from the SELECT. All other columns retained. The function still returns user_display (full_name → email-prefix → "Unknown") which is sufficient for every caller. Zero callers in the codebase (grep -r get_memory_provenance apps/ packages/ returns no hits). Closes White W1 review finding from PR #55. Migration must be applied to prod via supabase db push --linked after merge.

2026-04-29 — v0.3.1: behavioral drift (Jensen-Shannon divergence on tool-call distributions)

• Behavioral drift algorithm: replaced the v1 insufficient_data stub in behavioral-drift.ts with a real Jensen-Shannon divergence implementation. Per-agent temporal drift: for each agent active in both windows with ≥5 calls per window, compute JSD(baseline_distribution, current_distribution) over the union tool vocabulary with Laplace smoothing, normalize to [0,1] by dividing by ln(2), and average across eligible agents (max 20). Returns BehavioralDriftReport with score, status, note, jsd (raw), agentCount, agentDistributions (top-3 tools per agent), and windowA/windowB boundary metadata.
• Type layer: new BehavioralDriftReport, AgentToolDistribution, BehavioralWindow interfaces in types.ts. DriftReport.behavioral retyped from MetricStub to BehavioralDriftReport (superset — no breaking change for callers reading score/status/note). DriftInput extended with baselineSince? and currentSince?.
• Weight rebalance: WEIGHTS in compute.ts shifted from {semantic: 1.0, coordination: 0, behavioral: 0} to {semantic: 0.7, coordination: 0, behavioral: 0.3}. For projects without tool_call_log volume, behavioral returns insufficient_data and contributes 0 — overall drift score drops ~30% relative to the v1 number for projects with sufficient behavioral data. Next target {0.5, 0.25, 0.25} when coordination ships.
• CLI: new --baseline-since <window> and --current-since <window> flags on tages drift. Both must appear together; baseline-since must be earlier than current-since; both use the existing Nd/Nh/ISO grammar. renderHuman extended with behavioral score, raw JSD, agent count, window boundaries, threshold guidance, and per-agent top-3 tool breakdown.
• Tests: 18 new tests — 12 in behavioral-drift.test.ts (windowing, JSD math, multi-agent averaging, top-tools reporting), 5 in compute.test.ts (weight exposure, weight contribution paths, edge cases), 1 in CLI drift.test.ts (flag parsing). 843 passing total (was 826 on main).

2026-04-29 — CI test-mock fix

• CI test-mock fix — supabase.auth interface added to commands-smoke mock: mockSupabase now includes a mockAuth object with stubbed setSession, getSession, and refreshSession (all returning a valid session shape). Without this, any test that calls writeAuthConfig and runs without TAGES_SERVICE_KEY set would crash with cannot read 'setSession' of undefined — because createAuthenticatedClient reads auth.json and calls supabase.auth.setSession(...) on the auth-path branch. The bug was latent until CI was widened from pnpm --filter @tages/server test to pnpm -r test in c9a27f1; resetMockSupabase() updated to clear the three new mock functions alongside from/rpc.

2026-04-29 — PR #55 White second-review fix bundle (W2 limit-semantics, W2-AOT codex regex, Q1 Windows guard)

• W2 limit-semantics — drift.ts --limit regression reverted: --limit now controls display top-K only (original semantics, default 10). A new MAX_DB_ROWS = 10000 constant applied to both Supabase queries provides defensive OOM protection without conflating "show top N keys" with "fetch N rows from the chronological window".
• W2-AOT codex regex — stripTagesBlock TOML array-of-tables support: targetHeader and anyHeader regexes now match [[mcp_servers.tages]] in addition to [mcp_servers.tages]. Hand-edited configs using double-bracket syntax are now cleaned correctly by --force. JSDoc updated to document the comment-swallowing limitation.
• Q1 Windows guard — pathToFileURL entrypoint fix (codex, cursor, gemini plugins): Replaced import.meta.url === \file://${process.argv[1]}`withimport.meta.url === pathToFileURL(process.argv[1]).href in all three plugins. The original was broken on Windows (import.meta.urlusesfile:///C:/...; process.argv[1]usesC:...— never equal), silently no-oppingmain()undernpx`.
• Regression test: packages/codex-plugin/src/__tests__/index.test.ts adds one test covering [[mcp_servers.tages]] strip (10 tests total, was 9). 826 passing overall.
• Deferred: W1 (comment swallowing before next non-tages header) — documented in JSDoc; S2 (friendly ENOENT for computeOracleSha) — punt, raw error acceptable for eval harness.

2026-04-29 — PR #55 White-review fix bundle

• B1 — drift.ts crash on bad --since: resolveSince() is now wrapped in try/catch; invalid input prints a clean error message and exits with code 1 instead of throwing uncaught.
• B2 — codex-plugin duplicate TOML block: --force no longer appends a second [mcp_servers.tages] header. A new exported stripTagesBlock() helper removes any existing tages tables in-place before the new block is written. USAGE text updated to reflect the replace-in-place behaviour.
• W2 — --limit applied to queries: tages drift --limit now passes .limit() to both Supabase queries (field_changes and tool_call_log) in addition to display truncation; the value is validated as a positive integer.
• W3 — agents-md federation header: when agents-md-owners.json is configured but memories.team_id doesn't exist, the generated AGENTS.md opens with a machine-readable <!-- TAGES_FEDERATION_NOTE: ... --> HTML comment so agents and reviewers see the limitation immediately.
• Q1 — dynamic oracle SHA: eval/longmemeval/src/dataset.ts now exports computeOracleSha() that hashes the on-disk oracle file at run time; run.ts reports the actual SHA instead of a hardcoded constant.
• CI widening: .github/workflows/ci.yml and publish.yml expanded from --filter @tages/server to -r (all packages). publish.yml also adds @tages/codex-plugin and @tages/gemini-plugin to the npm publish matrix.
• New tests (15 total): regression suite for codex-plugin (9 tests, including round-trip strip+append guard), plus entry-point tests for cursor-plugin (3) and gemini-plugin (3). Plugin main() calls guarded with import.meta.url check so packages are importable in tests.

2026-04-20

• README hygiene: Stripped unreproducible benchmark claim from ## Benchmarks section; corrected MCP tool, CLI command, test, and migration counts to match current codebase.
• Bet A — Memory Governance foundation: New /governance marketing page (draft, noindex). Migration 0057_provenance_fields.sql adds session_id, source_context, and tool_name columns to memories with a GIN index and a get_memory_provenance RPC. Memory TypeScript type extended with sessionId, toolName, and sourceContext. Formal spec at docs/provenance-model.md.
• Bet B — AGENTS.md native tooling: New tages agents-md write and tages agents-md audit CLI subcommands. write generates a canonical 6-section AGENTS.md from project memory. audit flags vagueness, missing sections, missing runnable commands, and absence of the three-tier Always/Ask/Never boundary pattern.
• Bet D — Cross-tool distribution: New @tages/cursor-plugin package. Running npx @tages/cursor-plugin installs Tages in Cursor by writing .cursor/mcp.json. Setup guide at docs/cursor-setup.md.
• CI: New .github/workflows/publish.yml triggers on v* tag push to publish packages to npm (requires NPM_TOKEN repo secret).
• Strategy documents: analysis/ directory lands with competitive analysis, trend scan, positioning brief, deep research execution doc, Monte Carlo pricing model, and research notes. PLAN.md and REMAINING.md added at repo root.

Review fixes (post-White review)

• supabase/migrations/0057_provenance_fields.sql: pinned search_path = public, extensions and added an is_project_member(auth.uid(), m.project_id) guard inside the get_memory_provenance SECURITY DEFINER function so it cannot leak provenance across projects. (B1, Q1)
• .github/workflows/publish.yml: publish @tages/cursor-plugin alongside @tages/shared, @tages/server, @tages/cli on v* tag push. (W1)
• packages/cli/src/commands/agents-md.ts: replaced the unsupported \Z anchor in extractSection with a JS-correct end-of-string lookahead so last-section audit rules (missing-commands, missing-tech-versions) fire correctly. Regression test added. (W2)
• apps/dashboard/src/components/marketing/governance-page.tsx: corrected session_id field type in the Provenance model table from text to uuid. (S1)
• W3 (test count targets) was declined — counts reflect a verified test-run output, not a goal. S2 (control-flow warning) was deferred — no runtime impact.

2026-04-20 — Bet A governance foundation (Sprint A + B + C)

• Pre-launch hygiene (Phase 0): HOOK.md and .semgrep-results/ added to .gitignore. Closed migration 0042 git gap — file had been applied to prod on Apr 10 but never committed; supabase migration list --linked confirmed prod/local match.
• Sprint A — Differentiation foundation (Phase 3.1 + 3.2): New @tages/codex-plugin package (TOML writer targeting ~/.codex/config.toml, --dry-run, block detection). New @tages/gemini-plugin package (JSON merge into ~/.gemini/settings.json with preserved top-level keys). New tages agents-md diff and tages agents-md federate CLI subcommands extending the Bet B foundation. White review fixes: gemini env-var placeholders, codex regex false-positive on [mcp_servers.tages.env] alone, diff negation-word boundary.
• Sprint B — LongMemEval harness scaffold (Phase 1.1): New eval/longmemeval/ directory with standalone TypeScript harness (not in pnpm workspace). RetainDB-pattern methodology documented with comparability caveat (Supermemory/RetainDB baselines on deprecated dataset). Pluggable memory backend: in-memory lexical floor + tages-cli real integration. Dry-run verified; real runs pending OPENAI_API_KEY + sandbox TAGES_EVAL_PROJECT.
• Sprint C — tages drift v1 (Phase 3.3): New tages drift CLI command (experimental). Semantic drift uses a real instability metric (1 − 1/distinct_values over field_changes); 10 unit tests cover zero/two/three-value instability, session+agent reporting, whitespace normalization, topK. Coordination drift stubbed (not_implemented) — blocked on memories.team_id column. Behavioral drift stubbed (insufficient_data / not_implemented) — tool_call_log has raw data, v2 calibration pending design partners. --json, --since, --agent, --limit flags.
• Chore: Plugin packages (cursor, codex, gemini) now use --passWithNoTests so pnpm -r test does not fail at the root.

2026-04-19

• Fixed GitHub OAuth login redirecting to the marketing homepage instead of /app/projects after callback. Root cause: SameSite=Strict cookies are withheld by the browser on cross-site top-level navigations (i.e. GitHub's redirect back to /auth/callback?code=...), so the PKCE verifier and refreshed session cookies never reached the server. Reverted to Supabase's default SameSite=Lax, which is the correct setting for SSR auth cookies. HttpOnly + Secure + Lax still blocks CSRF on state-changing requests.
• Invite-flow overhaul (Team plan): Team invites now send a one-time Supabase magic-link email rather than inserting directly into team_members. Pending invites expire after 30 days; expired rows are skipped by accept_pending_invites. Owners and admins can revoke a pending invite before it is accepted (new DELETE RLS policy). The invite role dropdown enforces RBAC at both the UI and server layers — owners can invite admin or member, admins can only invite member. Dashboard sign-ins now call accept_pending_invites via the OAuth callback, so web-only sign-ups resolve dangling invites automatically (previously only the MCP server did this on startup). Requires migrations 0055_invite_expiry.sql and 0056_invite_delete_policy.sql applied to your Supabase project.

2026-04-17

• Split literal Stripe-style test fixtures in safety.test.ts and observe.test.ts via string concatenation so GitHub secret scanning no longer flags them. The fixtures are intentional test inputs, not real credentials.

License

MIT

Named After

Tages — the Etruscan divine child who appeared from a furrow in the earth and dictated sacred knowledge to scribes before vanishing. The knowledge persisted long after the source was gone.