mem0/integrations/mem0-plugin/CHANGELOG.md

Changelog

All notable changes to the Mem0 plugin will be documented in this file.

0.2.9 — File-context injection, session summaries & activity timeline

Added

• File-context injection (PreToolUse/Read hook): Before Claude reads a file, the new on_file_read.sh hook searches mem0 for memories that reference that file path and injects a compact timeline of prior work as additionalContext. Gives Claude "I've seen this file before and here's what I remember" context automatically. Gates on file size (>= 1,500 bytes), 5-second hard timeout, silent skip on any failure. Applies to Claude Code, Codex, and Cursor (on_file_read_cursor.sh).
• Stop hook session summary (on_stop.sh): On session end, parses the transcript JSONL, extracts the last assistant message and files touched, builds a structured prompt, and stores it via the mem0 API with infer=True — letting the platform's backend AI extract structured facts (request, decisions, learnings, next steps). Memories are stored as metadata.type=session_summary with 90-day expiry. Guards: skips subagent sessions (agent_id present), dedup via marker file, always exits 0. Applies to Claude Code, Codex, and Cursor (on_stop_cursor.sh).
• SessionStart activity timeline (session_timeline.py): On startup (when project has existing memories), fetches the 10 most recent memories and renders a compact timeline with type icons, age indicators, and short text below the existing banner. Shows recent decisions, bug fixes, and session summaries at a glance. 5-second timeout — if the API is slow, the timeline silently skips while the banner still displays.
• scripts/file_context.py: Core Python module for file-context injection. Searches mem0 cloud API with both relative and absolute file paths, deduplicates results, formats as compact timeline with type icons and memory age.
• scripts/capture_session_summary.py: Core Python module for Stop hook. Reads transcript JSONL (tail 3,000 lines), extracts last assistant message, extracts file paths from tool_input fields, strips system tags and <private> blocks, stores via mem0 API.
• scripts/session_timeline.py: Core Python module for SessionStart timeline. Fetches recent memories from mem0 API, formats with type icons, relative age, and short text.

Changed

• on_session_start.sh: On startup (when memories > 0), calls session_timeline.py to inject a compact recent activity timeline below the existing banner and rubric instructions.
• hooks/hooks.json: Added PreToolUse matcher for Read (5s timeout) and Stop hook (30s timeout).
• hooks/codex-hooks.json: Added PreToolUse matcher for Read (5s timeout) and Stop hook (30s timeout).
• hooks/cursor-hooks.json: Added preToolUse matcher for Read (5s timeout) and stop hook (30s timeout).

0.2.8 — Automatic coding categories & global search

Added

• Global search mode (global_search setting): New global_search toggle in ~/.mem0/settings.json (default: false). When enabled, search_memories and get_memories calls use {"OR": [{"user_id": "*"}]} instead of the per-user per-project AND filter — returning all memories across all users and all app_id scopes in the platform project. Writes (add_memory) still tag with the current user_id and app_id. Solves the team-shared-memory use case where multiple team members need access to all memories regardless of which repo or user created them. Works on Claude Code, Cursor, and Codex.
• /mem0:switch-project --global / --no-global: Enables or disables global search via the switch-project skill. Persists to ~/.mem0/settings.json. No manual config editing needed.
• Session banner scope indicator: Banner shows scope=global when global search is active instead of project=<app_id>.
• Global-aware memory count: Session start memory count query uses the global filter when global_search is enabled.
• Background coding-category setup (scripts/auto_setup_categories.py): The coding-focused category taxonomy (17 categories tuned for development work) is now installed automatically in the background on session start — the same way auto_import.py imports CLAUDE.md/AGENTS.md. Users are no longer asked to configure it during onboarding. Mirrors the auto-import design: resolves the API key, holds a lock file (~/.mem0/categories_setup.lock), reuses the proven setup_coding_categories.py taxonomy + project.update path via the plugin venv, logs to stderr only, and always exits 0 so it can never block a session.
• Per-account state gating (~/.mem0/categories_setup.json): Keyed by a hash of the API key → a hash of the taxonomy. Categories are scoped to the mem0 project tied to the API key (not the local repo), so setup runs once per account and skips all network calls thereafter — re-applying only if the taxonomy itself changes.
• tests/test_auto_setup_categories.py: Covers fingerprint determinism/sensitivity, state-file load/save/gating, and idempotent apply via an injected fake client (no SDK, no network).

Changed

• on_session_start.sh: Spawns auto_setup_categories.py in the background on startup (alongside auto_import.py), preferring the venv python so the SDK is available. Covers Claude Code, Cursor, and Codex, which all route SessionStart through this script.
• /mem0:onboard Step 5 is no longer interactive: Removed the Install coding categories? [Y/n] prompt. Categories now configure automatically in the background; the onboarding step only verifies status and applies them if the background run hasn't finished yet — mirroring how Step 4 (project-file import) already works.
• Session-start "new project" hint now notes that coding categories install automatically in the background.

0.1.0 — Antigravity

Added

• Antigravity plugin (.antigravity/): Restructured to follow the same shared-infrastructure pattern as Claude Code, Cursor, and Codex. Self-contained plugin directory with plugin.json, mcp_config.json, hooks/hooks.json (own file), scripts/ (symlink → ../scripts/), and skills/ (symlink → ../skills/). Installable via agy plugin install .antigravity or npx degit mem0ai/mem0/mem0-plugin/.antigravity ~/.gemini/config/plugins/mem0. Uses contextFileName: "AGENTS.md" per Antigravity convention.
• Codex hooks parity: Added missing PreToolUse Write/Edit/MultiEdit block and PreCompact hook to Codex hooks config, bringing it to full parity with Claude Code.

Changed

• Antigravity plugin directory: Renamed .antigravity-plugin/ → .antigravity/ to match the naming convention of .claude-plugin/, .cursor-plugin/, .codex-plugin/. Plugin is now self-contained so agy plugin install and npx degit both work.
• Antigravity hooks: Hooks now live directly in .antigravity/hooks/hooks.json as a standalone file — no indirection.
• Antigravity install command: Updated from npx degit mem0ai/mem0/mem0-plugin to npx degit mem0ai/mem0/mem0-plugin/.antigravity. Added agy plugin install as alternative for local clones.

Removed

• Stale root-level files: Deleted mem0-plugin/hooks.json, mem0-plugin/mcp_config.json, mem0-plugin/plugin.json — leftover artifacts from before plugin restructuring into per-editor subdirectories. Nothing referenced them; install commands point to .antigravity/.

0.2.7

Fixed

• First-install auth failure (closes #4876): Removed authorizationUrl from .mcp.json. When both a static Authorization header and authorizationUrl were present, Claude Code preferred the OAuth flow, which failed on reconnect — leaving new users stuck with only authenticate/complete_authentication stub tools. Authentication now uses the MEM0_API_KEY header exclusively; no browser OAuth flow is triggered.
• Onboarding skill removed OAuth step: /mem0:onboard Step 2 no longer guides users through a browser-based OAuth login. The MCP server authenticates via the API key set in Step 1.
• Removed claude plugin configure mem0 references: This CLI command does not exist. The userConfig mechanism works through the plugin enable UI prompt — Claude Code prompts for the API key when the plugin is first enabled and stores it securely in the system keychain. Updated session start banner, onboarding skill, identity script comments, and manual testing guide.

0.2.6

Fixed

• Memory count zero / stats and tour showing 0 memories: The run_id: "*" wildcard filter — added in the initial v0.2.6 fix — returns 0 on both the v3 list endpoint (/v3/memories/) and search endpoint (/v3/memories/search/) when memories were written without a run_id (which is all memories since v0.2.6 stopped setting run_id on add_memory). Removed run_id: "*" from: on_session_start.sh count queries, enforce_metadata_defaults.sh hook injection (was injecting into every search_memories and get_memories call), _search.py search payload, /mem0:stats and /mem0:tour skill instructions. All read paths now use simple user_id + app_id filters without run_id, matching how v0.2.3 worked.
• add_memory no longer sets run_id: Session tracking moved from top-level run_id (which creates a separate API partition) to metadata.session_id. New memories land in the default partition and are visible to all queries.
• enforce_metadata_defaults.sh no longer injects run_id: The hook was appending {"run_id": "*"} to every search_memories and get_memories filter, which broke both endpoints. Removed entirely — identity injection (user_id/app_id) still works.
• _search.py simplified: Removed run_id: "*" from search payload. Uses plain user_id + app_id filters.
• auto_import.py delete endpoint 404: Stale chunk deletion used DELETE /v3/memories/{id}/ which returns 404 (v3 is ADD-only). Changed to DELETE /v1/memories/{id}/.
• Banner count accurate: on_session_start.sh count query uses user_id + app_id filters without run_id. Shows total count only (removed noisy auto-import breakdown).
• quickstart.md wrong add endpoint: cURL example used POST /v1/memories/ (v1 add is removed). Fixed to POST /v3/memories/add/.
• Session stats always 0: PostToolUse hooks never fire for plugin MCP tools (confirmed via debug logs — only SessionStart, UserPromptSubmit, PreToolUse, and Stop fire). Moved session stats tracking (session_stats.py add/search) into enforce_metadata_defaults.sh (PreToolUse), which does fire on every MCP tool call.
• Periodic nudge never firing: Message count file used session UUID in filename (/tmp/mem0_msg_count_${SESSION_ID}) which was cleared on session start. Changed to $USER-keyed filename, matching the session stats file convention.
• /mem0:stats session query returning 0: Stats skill attempted API queries with run_id and metadata.session_id filters that return empty results. Session stats now come exclusively from the local stats file (which is accurate now that PreToolUse tracks adds).
• Auto-capture stops working mid-session: After the initial rubric injection (first message), subsequent messages got zero context from the UserPromptSubmit hook. The banner instruction to "proactively store learnings" fades as conversation grows and Claude forgets. Two-pronged fix: (1) Direct API auto-capture hook (auto_capture.py): every 3rd message, on_user_prompt.sh spawns a background Python script that reads the last 3 exchanges from the transcript JSONL and sends them directly to POST /v3/memories/add/ with infer=True. No reliance on Claude calling add_memory. (2) Proportional prompt nudge as fallback: starting from 3rd message, if Claude has stored fewer than 1 memory per 3 messages, a brief "store learnings via add_memory" directive is injected.
• Desktop app: API key not found: Claude Code Desktop does not inherit shell environment variables — only PATH is read from shell profiles. Users who set export MEM0_API_KEY=m0-... in ~/.zshrc or ~/.bashrc got "Setup Required" on Desktop while CLI worked fine. Added grep-based shell profile extraction as a 4th fallback in both _identity.sh (bash) and _identity.py (Python). Scans ~/.zshrc, ~/.bashrc, ~/.zprofile, ~/.bash_profile, ~/.profile for MEM0_API_KEY= assignments. Skips variable references ($OTHER_VAR), commented-out lines, and strips quotes/inline comments.
• Desktop app: zero memories added over multi-day usage: Agent never proactively called add_memory — only search_memories and get_all. Root cause: session banner instruction was passive ("before finishing a session, store learnings") and easily ignored. No mechanism existed to re-prompt the agent mid-session. Fixed with a periodic nudge in on_user_prompt.sh: every 5th substantial message, the hook checks session_stats for add count; if fewer than 2 memories stored, injects a directive into Claude's context via additionalContext telling it to store learnings immediately. Counter resets on session start.
• Setup Required banner missing Desktop instructions: Updated no-API-key banner with Desktop-specific setup paths: claude plugin configure mem0, Desktop app environment editor (Settings > Environment), and CLI export as fallback.

Removed

• Stop hook (all 3 editors): Removed from hooks.json, cursor-hooks.json, codex-hooks.json. Deleted on_stop.sh, on_stop_cursor.sh, on_stop_codex.sh, stop_hook_check.py. The Stop hook could not reliably feed context back to Claude (command-type hooks' reason field is user-facing only, not injected into Claude's context). Auto-capture handled by PreCompact hook instead.
• SessionEnd hook: Removed from hooks.json. Deleted on_session_end.sh. Redundant with PreCompact auto-capture.
• 5 redundant hook scripts: on_git_commit_capture.sh (fired on every Bash command containing "git"), on_post_commit.sh (fired on every Bash command), on_task_completed.sh, on_post_compact.sh, on_subagent_stop.sh. These were already removed from Claude's hooks.json in v0.2.5 but script files remained on disk. Also removed on_post_commit.sh references from cursor-hooks.json and codex-hooks.json.
• Dead settings: Removed output_style, skip_tools, capture_tools from load_settings.py defaults. The output-styles/ directory and on_tool_failure.sh script were already deleted.
• test_on_file_read.py: Removed test file for deleted on_file_read.sh hook.

Changed

• /mem0:stats lifetime query: Single get_memories call with user_id + app_id filters (no run_id).
• /mem0:tour full fetch: Single get_memories call with user_id + app_id filters (no run_id).
• API key resolution order (4 fallbacks): MEM0_API_KEY env var > CLAUDE_PLUGIN_OPTION_API_KEY (plugin configure) > CLAUDE_PLUGIN_OPTION_MEM0_API_KEY (legacy userConfig) > shell profile extraction. Applies to both _identity.sh and _identity.py.
• Session start banner: Proactive memory instruction changed from passive "before finishing a session" to active "proactively store learnings incrementally as work progresses. Do NOT wait until the session ends."
• Message counter on session start: on_session_start.sh now resets /tmp/mem0_msg_count_* files to ensure nudge counter starts fresh each session.

0.2.5

Fixed

• PostToolUse field name: tool_output → tool_response: All three PostToolUse scripts (on_bash_output.sh, on_post_commit.sh, on_post_tool_use.sh) were reading .tool_output from stdin JSON — a field that never existed in the Claude Code hooks spec. The correct field is .tool_response (confirmed via official docs at code.claude.com/docs/en/hooks). This was silently null on every invocation, meaning bash error detection and post-commit checks never actually fired.
• Stop hook invalid hookSpecificOutput: on_stop.sh returned hookSpecificOutput with hookEventName: "Stop" — but Stop is not a valid hookEventName discriminant. Claude Code rejected the JSON with "Hook JSON output validation failed". Replaced with spec-compliant { decision: "block", reason: "..." }.
• SessionStart banner invisible: Switched from JSON hookSpecificOutput.additionalContext (discrete/hidden system reminder) back to raw text cat <<BANNER (shown directly in transcript). Per official docs, raw stdout from SessionStart hooks is visible context; additionalContext is not.
• Write|Edit matcher missing MultiEdit: block_memory_write.sh could be bypassed via MultiEdit tool. Matcher now Write|Edit|MultiEdit.
• PreToolUse MCP matcher coverage gap: enforce_metadata_defaults.sh not triggered for get_memory or update_memory. Added 4 tool name variants.
• capture_compact_summary.py never called: on_session_start.sh compact branch never spawned it. Post-compaction summaries were not stored. Added background spawn.
• Unguarded variables under set -u in on_session_start.sh: Bare ${MEM0_RESOLVED_USER_ID} etc. without :- fallbacks. Script died silently if _identity.sh failed to source. All references now use ${VAR:-default}.
• enforce_metadata_defaults.sh silent failure on jq error: Final jq -n --argjson had no error guard under set -euo pipefail. Added || true.
• Single-quote injection in on_git_commit_capture.sh: Shell variables interpolated via '$VAR' inside python3 -c. Filenames with ' broke Python syntax. Replaced with os.environ.get().
• Identity injection on add_memory (enforce_metadata_defaults.sh): Hook now sources _identity.sh and injects user_id and app_id as top-level params when the agent omits them. Prevents orphaned memories with null scoping that were invisible to filtered queries. Root cause of onboarding writes landing with user_id=null, app_id=null.
• Identity injection on search_memories and get_memories: Hook now intercepts these tools and injects user_id/app_id into filters.AND[] when missing. Handles three filter states: no filters (creates from scratch), flat filters (converts to AND format), existing AND array (appends missing clauses). Prevents MCP server from auto-injecting wrong identity.
• Identity injection on delete_all_memories: Hook injects top-level user_id/app_id to prevent accidental cross-scope deletion.
• /mem0:export incorrect get_memories call: Was passing user_id/app_id as top-level params; MCP tool only accepts them inside filters. Changed to filters={"AND": [{"user_id": "..."}, {"app_id": "..."}]}.
• /mem0:stats same get_memories issue: Fixed both lifetime and session stat queries to use filters instead of top-level identity params.
• /mem0:pin passes metadata to update_memory: MCP update_memory tool only accepts memory_id, text, source — no metadata param. Pin/unpin now uses [PINNED] text prefix marker instead. Also added explicit user_id/app_id to add_memory for new pinned memories.
• /mem0:health --deep ambiguous get_memories call: Clarified identity goes in filters, not as top-level params.
• /mem0:memory-reviewer same ambiguity: Explicit filters={"AND": [...]} for get_memories.
• /mem0:dream stale artifact: Removed (item 15) from Step 4 heading.
• /mem0:dream contradiction resolution no-op: update_memory on loser with its own text did nothing. Changed to delete_memory(memory_id=<loser_id>) to actually remove the losing memory.
• /mem0:health Check 3 search_memories top-level user_id: Removed top-level user_id param; identity only in filters.AND[]. Changed limit to top_k.
• /mem0:health Check 4 add_memory missing infer=False: Health probe wasted LLM tokens on extraction. Added infer=False. Also fixed: was expecting memory_id in response but v3 returns event_id. Now uses get_event_status to get memory ID for cleanup.
• /mem0:tour get_memories top-level identity: Both standard and cross-project modes passed user_id/app_id as top-level params. Moved to filters.AND[].
• /mem0:onboard search_memories top-level user_id: Removed extra top-level user_id param from connectivity check.
• /mem0:context-loader incomplete filter table: Filter examples showed only metadata.type without user_id/app_id. Now shows full AND filter structure.
• 7 skills used limit instead of top_k for search_memories: MCP tool param is top_k, not limit. Fixed in: health, onboard, tour (3 places), switch-project, stats (weekly mode + latency probe).
• /mem0:stats latency probe missing filters: search_memories call had no identity filters. Added user_id/app_id in filters.AND[].

Added

• stop_hook_check.py: Pure-stdlib transcript analyzer for the Stop hook. Reads last 500 lines of transcript JSONL, parses tool calls, file modifications, and git commands. Returns {"should_block": bool, "context": "..."}. Trivial sessions (< 3 tool calls, no file edits) skip capture entirely.
• Checklist for /mem0:dream: 6-step progress tracker per Claude skill best practices for complex multi-step workflows.
• Checklist for /mem0:onboard: 7-step progress tracker for onboarding wizard.
• Expanded hook matcher (all 3 configs): enforce_metadata_defaults.sh now triggers on add_memory, search_memories, get_memories, get_memory, update_memory, and delete_all_memories (12 tool name variants covering both MCP naming conventions).

Changed

• Stop hook uses MCP-driven capture: When meaningful work detected and no memories stored, returns decision: "block" asking Claude to call add_memory via MCP. One-shot flag prevents infinite loops. REST API capture runs in background as fallback.
• SessionStart banner uses raw text stdout: Replaced JSON additionalContext with cat <<BANNER for reliable display per official hooks spec.
• enforce_metadata_defaults.sh rewritten: Handler-based dispatch for 4 tool types. add_memory gets top-level identity + metadata defaults. search_memories/get_memories get filter identity injection. delete_all_memories gets top-level identity. Never overrides explicitly-passed identity.

0.2.4

Fixed

• PostToolUse matcher mismatch (hooks.json:81): Changed from mcp__mem0__ to mcp__mem0__|mcp__plugin_mem0_mem0__. Root cause of session stats recording nothing — 146 consecutive "no memory operations" entries. Unblocks /mem0:stats session line, stop-hook report, and session_stats.py tracking.
• File-read hook noise (on_file_read.sh): Replaced bare-filename semantic search with metadata.files filter + score threshold (≥ 0.4). Falls back to basename search if metadata filter returns nothing. Eliminates irrelevant context injection on every Read.
• /mem0:pin uses v3-removed immutable=True: Removed Step 3a entirely. Standardized on metadata.pinned: true (which dream/SKILL.md already respects during pruning). Fixed unconditional ... appended to short pin confirmations.
• /mem0:list-projects undercounts (implicit null scoping): Dual-query approach — runs both null-scoped and app-scoped get_memories calls, merges by ID. Handles legacy metadata.project_id and metadata.project fields.
• /mem0:peek free-text search on memory IDs: Detects bare hex IDs (^[a-f0-9]{8}$) and [mem0:<hex>] citation refs, routes to get_memory direct lookup instead of semantic search.
• Dead PostToolUseFailure hook block: Removed entirely — this hook event does not exist in Claude Code.

Added

• Session ID capture (on_session_start.sh): Extracts session_id from Claude Code stdin JSON, persists to /tmp/mem0_session_id_$USER. Falls back to timestamp-based ID. Enables run_id-based session scoping.
• run_id injection (enforce_metadata_defaults.sh): Reads session ID from temp file, injects as run_id into every add_memory call. Tags all memories with session identity for entity-scoped filtering.
• min_score, metadata_filters, rerank, threshold params (_search.py): search_memories() now accepts min_score: float to filter low-relevance results, metadata_filters: dict for field-level filtering, rerank: bool for managed reranker, and threshold: float (default 0.3, up from platform default 0.1) for server-side relevance gating. Existing callers unaffected (new params have defaults).
• Rerank on tour/peek: /mem0:tour and /mem0:peek search calls now pass rerank=true for better result ordering (+150–200ms latency, significantly improved precision).
• /mem0:stats session query via run_id: Queries memories by run_id filter for API-backed session counts. Cross-checks against local stats file. Shows truncated session ID in output.

Removed

• /mem0:protocol skill: Routing table fully superseded by individual skill descriptions (auto-trigger). Operational guidelines (search patterns, metadata rules) covered by enforce_metadata_defaults.sh hook and individual skill bodies.

Changed

• All 17 skill descriptions: Rewritten per Claude skill best practices — each now includes what the skill does AND when to trigger it, with specific keywords for auto-discovery. Average length 200–270 chars (under 1024 max). Third person, action verbs.
• Onboarding auto-trigger (on_session_start.sh): Replaced 3-state marker-file logic with memory-count detection. New project (0 memories) → prompts Claude to invoke /mem0:onboard. No marker files, no OAuth state. Simplified no-API-key path to single inactive banner.

0.2.3

Added

• Read hook (on_file_read.sh): PreToolUse(Read) hook that searches mem0 for memories tagged with the file being opened and injects them as context. Skips non-code files, lockfiles, and node_modules/. Deduplicates repeated reads within a session.
• Shared search module (_search.py): Wraps POST /v3/memories/search/ into a reusable search_memories() call with format_results_for_context() for consistent [type] content [mem0:id] display. Used by all pre-fetch hooks.
• User settings (load_settings.py): Loads config from ~/.mem0/settings.json with 9 keys: auto_save, auto_search, search_limit, retention_session_days, confidence_threshold, output_style, debug, skip_tools, capture_tools. Supports init subcommand for first-run creation.
• /mem0:forget skill: Standalone skill for deleting memories by search query or UUID with confirmation. Supports undo-last-N via session_stats.py peek.
• /mem0:peek skill: Compact quick-search with one-liner output. Runs 2 parallel searches (broad + decision-filtered), deduplicates by ID.
• /mem0:memory-reviewer skill: Read-only memory quality audit. Scans for near-duplicates (>60% noun overlap), contradictions, low-confidence entries, untagged memories, and stale entries (>180 days). Refers to /mem0:dream for remediation.
• /mem0:context-loader skill: Pre-fetch agent that runs 2–4 parallel search_memories calls across query angles and type filters, deduplicates, outputs up to 10 memories. Silent on empty results.
• Compact memory output style (output-styles/compact-memory.md): [<type>] <content, max 80 chars> [mem0:<short_id>] format used by peek, tour, and inline search display.
• userConfig in .claude-plugin/plugin.json: api_key field (sensitive: true) enables key storage via claude plugin configure mem0.
• OAuth support: authorizationUrl added to .mcp.json for OAuth flow alongside token-based auth.
• Tests: test_search.py, test_rubric_dedup.py, test_on_file_read.py.

Changed

• Skills renamed: All mem0-* prefixed skill directories renamed to shorter forms (e.g., mem0-dream → dream, mem0-mcp → protocol, mem0-tour → tour). 12 skills renamed total.
• Pre-fetch on bash errors: on_bash_output.sh now performs actual search_memories calls via _search.py instead of emitting search query templates as text.
• Session-resume pre-fetch: on_user_prompt.sh detects resume phrases ("where did we leave off", "continue from where") and pre-fetches session_state + decision memories.
• Remember-intent routing: on_user_prompt.sh detects save phrases ("remember this", "don't forget that") and routes to /mem0:remember skill instead of raw add_memory.
• Rubric deduplication: Search guidance rubric injected only on first user prompt per session via flag file.
• Namespace-agnostic tool matching: on_post_tool_use.sh and on_tool_failure.sh now use wildcard suffix matching (*__add_memory) instead of hardcoded mcp__mem0__ prefix.
• API key resolution: _identity.sh/_identity.py now check CLAUDE_PLUGIN_OPTION_API_KEY (from userConfig) before legacy CLAUDE_PLUGIN_OPTION_MEM0_API_KEY.
• Session start: Three-state no-key handling (first run → auto-onboard, OAuth mode → proceed, neither → inactive banner). Banner now shows auth=api_key|oauth.
• Hook timeouts: on_user_prompt.sh and on_bash_output.sh raised from 5s to 12s.
• Compact prompts: on_task_completed.sh and on_stop.sh replaced multi-step checklists with single-line directives (0–2 durable facts max).
• /mem0:dream: Removed --forget (now standalone forget skill) and --schedule flags.
• /mem0:health: Removed --fix auto-fix mode; output condensed to PASS/FAIL CheckName Detail one-liners.
• /mem0:protocol (was mem0-mcp): Added 14-entry natural-language-to-skill routing table. (Removed in 0.2.4 — superseded by skill descriptions.)
• CLI config fallback removed: _identity.sh/_identity.py no longer read ~/.mem0/config.json; API key resolution is env-var-only.
• auto_import.py: Added content-hash deduplication to skip files with identical content within a single import run.
• All skill descriptions: Shortened to concise one-liners.

Fixed

• Namespace-agnostic tool name parsing in on_tool_failure.sh: ${TOOL_NAME##*__} correctly strips any MCP namespace prefix, not just mcp__mem0__.
• _identity.py/_identity.sh: CLAUDE_PLUGIN_OPTION_API_KEY env var was not checked, causing key-not-found when using userConfig.
• Three previously failing tests (test_on_file_read.py, test_rubric_dedup.py, test_write_path.py) fixed after hook changes.

Removed

• /mem0:dream --forget flag: Extracted to standalone forget skill.
• /mem0:dream --schedule flag: Use Claude Code's built-in /schedule command instead.
• /mem0:health --fix flag: Auto-fix mode removed entirely; use /mem0:dream for remediation.
• CLI dependency for key management: All ~/.mem0/config.json fallback code removed.

0.2.2

Fixed

• Duplicate memory writes on compaction: on_pre_compact.py was running as both primary and backup capture path. Now reads session_stats and skips if agent already stored 2+ memories. on_stop.sh and on_session_end.sh were both calling on_pre_compact.py, creating double captures — removed redundant calls.
• Verbose session-state blobs: on_pre_compact.py build_content() was producing 5000+ char structured markdown. Now produces minimal 2-line summary (Working on:, Files touched:), relying on infer=True for extraction.
• Pre-compaction prompt rewrite: Instruction changed from "store a single large session_state blob with infer=False" to "store 0–3 durable facts per session (15–50 words each), one per add_memory call, tagged by category."
• False-positive error detection: on_bash_output.sh and on_user_prompt.sh error grep pattern was too broad, triggering on routine test/linter output. Now uses two-tier approach: high-signal patterns (Traceback, panic:, FATAL:) fire always; lower-signal (Error:, Exception:) require 2+ occurrences.
• Background on_pre_commit.py on every git commit: on_git_commit_capture.sh was storing commit_context memories regardless of usefulness. Background call removed; hook now only performs memory search. on_pre_commit.py deleted.
• Post-commit prompt always firing: on_post_commit.sh now gated behind settings.commit_prompts: true in mem0.md (defaults to off).
• Project ID lost after folder rename: _project.py only looked up project_map.json by CWD path. Added remote-hash fallback: hashes git remote.origin.url to a 16-char key, self-heals map on hit.
• Subagent skip list hardcoded: on_subagent_stop.sh now reads settings.subagent_skip from mem0.md instead of hardcoded Explore|Plan.
• Auto-import missed project-root files: auto_import.py only searched CWD. Added _git_root() helper to also search git root when invoked from subdirectory.
• Concurrent ensure_deps.sh install race: Multiple parallel sessions could corrupt the venv. Added lock directory with 60s spin-wait and .install-failed sentinel.
• Telemetry distinct_id used MD5: Changed to SHA-256 (truncated 32 chars).
• Telemetry caller props could override system props: Moved system fields after spread so they always win.
• Plugin version hardcoded in telemetry.py: Replaced with _load_plugin_version() reading from plugin.json.
• Onboard marker race: Marker now created in on_session_start.sh when prompt is first displayed, not after skill completes.

Changed

• capture_compact_summary.py: infer changed from False to True so platform can extract structured facts.
• Chunking utilities extracted to _chunking.py: split_by_headers, split_by_hr_or_headers, filter_and_truncate moved from import_competing_tools.py to shared module.
• auto_import.py now chunks Markdown files: .md files split by ## headers before import instead of single blob.
• enforce_metadata_defaults.sh: New PreToolUse hook on add_memory for all three editors. Injects default metadata (confidence: 0.7, source: "auto_capture", type: "task_learning") when agent omits them.
• mem0.md Settings section parsing: parse_mem0_config.py now parses Settings section; added --key <dotted.path> CLI argument for programmatic lookup.
• Project config display condensed: Session start shows compact summary line instead of raw JSON dump.

Added

• scripts/_chunking.py — shared content-chunking utilities.
• scripts/enforce_metadata_defaults.sh — metadata defaults injection hook.
• parse_mem0_config.py --key — CLI accessor for individual mem0.md config keys.
• Native MEMORY.md detection: on_session_start.sh detects Claude Code auto-memory and prompts to disable or run /mem0:import.
• /mem0:list-projects skill: Discovers all project app_id scopes by paginating get_memories without an app_id filter.
• /mem0:tour cross-project mode (--all-projects) and peek mode (query argument).
• /mem0:stats weekly digest mode (--weekly).
• /mem0:dream --forget mode: Search-confirm-delete flow with undo-last-write.
• /mem0:import --tools flag: Import from competing AI tool configs.
• conftest.py — _clean_project_map autouse fixture preventing cross-test pollution.

Removed

• scripts/on_pre_commit.py — source of unwanted background writes on every commit.
• /mem0:digest skill — merged into /mem0:stats --weekly.
• /mem0:forget skill — merged into /mem0:dream --forget.
• /mem0:import-tools skill — merged into /mem0:import --tools.
• /mem0:peek skill — merged into /mem0:tour <query>.
• tests/test_pre_commit.py — tests for deleted script.

0.2.1

Added

• 11 new skills: /mem0:dream (memory consolidation), /mem0:export (portable YAML-frontmatter export), /mem0:import (re-import exported memories), /mem0:import-tools (import from Cursor/Copilot/Cline/Continue configs), /mem0:forget (delete with confirmation), /mem0:health (diagnostic check — API key, MCP connectivity, read/write), /mem0:peek (compact quick-search), /mem0:pin (mark memory as high-priority), /mem0:remember (quick verbatim store with auto-classification), /mem0:stats (session + lifetime statistics), /mem0:digest (weekly memory summary).
• 8 new hook scripts: on_bash_output.sh (scan bash output for errors, surface anti_pattern/bug_fix memories), on_git_commit_capture.sh (detect git commit/merge/rebase, search relevant memories), on_post_commit.sh (prompt to save commit learnings), on_post_compact.sh (recovery prompt to reload context after compaction), on_session_end.sh (last-chance transcript capture with dedup marker), on_subagent_stop.sh (remind to capture learnings from non-Explore/Plan subagents), on_tool_failure.sh (classify MCP failures as auth/rate-limit/network, suggest recovery), on_pre_commit.py (capture staged changes via REST API).
• PostHog telemetry (telemetry.py): Anonymous, fire-and-forget, 10% sampled. Uses stdlib urllib (no SDK dependency). Sends event type, platform, plugin version, anonymized identity. Never sends memory content or API keys. Opt-out via MEM0_TELEMETRY=false.
• 10 new memory categories in setup_coding_categories.py: dependency_decisions, performance_findings, security_constraints, testing_patterns, data_model, api_contracts, deployment_runbook, team_norms, domain_glossary, experiment_results.
• Dependency management (ensure_deps.sh): Installs mem0ai into persistent venv at ${CLAUDE_PLUGIN_DATA}/venv. Skips re-install if requirements.txt hash unchanged. Runs on Setup(init|maintenance) hook and every SessionStart.
• Competing tool importer (import_competing_tools.py): Parses and uploads configs from .cursorrules, .github/copilot-instructions.md, memory-bank/, .continue/rules.md. Splits by Markdown headers/horizontal rules.
• Export file parser (parse_export_file.py): Parses YAML-frontmatter Markdown format into JSON array.
• Config parser (parse_mem0_config.py): Reads mem0.md and extracts Retention section into category-to-days mapping.
• Auto-onboarding: on_session_start.sh detects first-time projects and triggers /mem0:onboard automatically.
• mem0.md config loading: Session start parses mem0.md and injects project config into context.
• Inactive API key banner: Shows Mem0 Inactive with api_key=NOT_SET instead of silently exiting.
• requirements.txt: Declares mem0ai as plugin's Python dependency.
• Tests: test_coding_categories.py, test_import_competing_tools.py, test_parse_export_file.py, test_parse_mem0_config.py, test_pre_commit.py, test_session_stats.py, test_telemetry.py, test_write_path.py.

Changed

• API scoping: metadata.project_id → app_id: All scripts and skills now pass project_id as top-level app_id parameter instead of inside metadata. Affects auto_import.py, capture_compact_summary.py, on_pre_compact.py, all stop hooks, all skill instructions.
• API endpoint: v1 → v3: auto_import.py, capture_compact_summary.py, on_pre_compact.py now call /v3/memories/add/.
• API key resolution: _identity.py and _identity.sh now check CLAUDE_PLUGIN_OPTION_MEM0_API_KEY (Claude Code userConfig env var) as fallback after MEM0_API_KEY.
• session_stats.py: Added per-category counters, rolling list of up to 50 recent memory IDs, peek subcommand for non-destructive stat reading.
• setup_coding_categories.py: Now imports mem0ai from managed venv via sys.path injection.
• on_stop_cursor.sh: Added loop_count guard to prevent re-entry loops.
• on_stop.sh: Removed set -e so session-end reminder always emits even if session_stats.py fails. Added dedup marker (~/.mem0/.captured_<session_id>).
• on_user_prompt.sh: Detects source file paths in prompt and adds metadata.files contains search filter. Handles no-API-key case gracefully.
• /mem0:tour: Replaced 7 parallel type-filtered search_memories calls with single get_memories(app_id=...) + 3 broad searches (type filtering misses auto-categorized memories).
• /mem0:onboard: Added SDK install step, changed MCP check to use ToolSearch, writes onboard marker to prevent re-triggering.
• /mem0:mcp: Added 16-row category-to-query routing table, inline citations requirement, branch in metadata requirement.

Fixed

• auto_import.py, capture_compact_summary.py, on_pre_compact.py: Were reading MEM0_API_KEY directly; now use resolve_api_key() so CLAUDE_PLUGIN_OPTION_MEM0_API_KEY is honored.
• on_pre_compact.py: resolve_project_id() and resolve_branch() now receive cwd from hook input instead of os.getcwd(), fixing incorrect identification when hook fires in different directory.
• on_stop_codex.sh, on_stop_cursor.sh: Missing _identity.sh source call; API key resolution via userConfig fallback was broken.
• on_post_tool_use.sh: Input field corrected from tool_result to tool_output to match hook JSON schema.

0.2.0

Added

• Project-scoped memories: Deterministic project_id from git remote (_project.sh / _project.py). Memories are now isolated per-repo via metadata.project_id on every add_memory and search_memories call. Same repo cloned twice → same project_id.
• Branch-aware tagging: metadata.branch stamped on session-state and compact-summary memories. Enables branch-scoped recall (e.g. "what was I doing on feature/auth-rewrite?").
• Auto-import of project files: SessionStart detects CLAUDE.md, AGENTS.md, .cursorrules, .windsurfrules, mem0.md — hashes them (SHA-256), imports changed files as project_profile memories. Idempotent across sessions.
• Active identity banner: SessionStart now prints user=X | project=Y | branch=Z | memories=N instead of a silent bootstrap.
• Session-end report: Stop hook prints Session: wrote N memories, retrieved M. Categories touched: ... and appends to ~/.mem0/session-log.md.
• /mem0:onboard skill: Post-install wizard — verifies API key, detects and imports project files, installs coding categories, prints setup summary. 30 seconds to value.
• /mem0:tour skill: Shows all memories for the current project grouped by category. Proof-of-value demo.
• /mem0:switch-project skill: Manual project_id override for monorepos and non-git directories. Persists to ~/.mem0/project_map.json.
• Session stats tracker (session_stats.py): Tracks memory adds/searches per session for the end-of-session report.

Changed

• All hooks and mem0-mcp/SKILL.md now include project_id in every filter and metadata example.
• SessionStart banner replaces the previous "## Mem0 Identity" block with a compact one-liner.
• on_pre_compact.py and capture_compact_summary.py now include project_id and branch in stored metadata.

0.1.3

Fixed

• user_id resolution no longer derives from MEM0_API_KEY. v0.1.2 changed the resolver to fall back to "mem0-" + sha256(MEM0_API_KEY)[:12] ahead of $USER, which silently moved every existing user to a new bucket on update. Memories written under the previous $USER value became unreachable from the plugin. Resolution is now back to MEM0_USER_ID → $USER → "default".
• Dropped the "regardless of which machine you're on" line from the SessionStart bootstrap, since cross-machine consolidation now requires setting MEM0_USER_ID explicitly.

Notes for users upgrading from 0.1.2

• The ~/.mem0/identity.json cache file is no longer read or written. Safe to delete.
• If you wrote memories during the v0.1.2 window, they live under mem0-<sha256(api_key)[:12]>. To recover: temporarily export MEM0_USER_ID=mem0-<hash>, search/export, then unset.
• Want a single bucket across machines (the original goal of #5076)? Set MEM0_USER_ID explicitly in your shell profile. The plugin will not auto-derive one.

0.1.2

Added

• Deterministic user_id resolver (_identity.sh / _identity.py) — reverted in 0.1.3, see above.
• SessionStart-compact handler (capture_compact_summary.py) that stores the post-compaction summary as a memory with metadata.type=compact_summary.
• Coding-taxonomy setup script (setup_coding_categories.py) — one-shot project.update(custom_categories=[...]) for architecture_decisions, anti_patterns, task_learnings, tooling_setup, bug_fixes, coding_conventions, user_preferences.
• Opt-in hook logging via MEM0_DEBUG=1 → ~/.mem0/hooks.log.
• mem0-mcp skill replacing the Claude-Code-specific mem0-codex skill.

Fixed

• session_id now written to memory metadata (on_pre_compact.py).
• SessionStart bootstrap exits silently when MEM0_API_KEY is unset.
• block_memory_write.sh regex tightened to MEMORY.md / .claude/memory/* — no longer blocks docs/memory/*.md.
• Removed duplicate PreCompact write path (kept agent-driven, dropped the parallel Python REST entry from hooks.json / cursor-hooks.json).
• Hook-side captures (session_state, compact_summary) now set expiration_date = today + 90 days.

0.1.1

• Cursor plugin fully functional (#4547).
• Codex plugin support and integration docs (#4665).
• Codex lifecycle hooks via opt-in installer (#4917).
• Removed invalid keys from Claude plugin config (#4821).

0.1.0

• Initial release: Mem0 plugin for Claude Code and Cursor (#4518).