Heartbeats and user messages were racing to use the agent, causing
409 CONFLICT errors ("Another request is currently being processed").
This adds a processing mutex to `sendToAgent()` (used by heartbeats):
- Waits for any in-progress message processing to complete
- Marks itself as processing to prevent queue from starting
- Releases lock and triggers queue processing when done
This ensures heartbeats and user messages are serialized.
Written by Cameron ◯ Letta Code
"Concurrency is hard. Mutexes are your friend." - Every debugger ever
When conversations become corrupted on Letta Cloud, users see empty
responses with no useful error message. This adds:
1. Warning message when empty result detected:
- Logs: "Agent returned empty result with no response"
- Suggests running `lettabot reset-conversation`
2. New CLI command `lettabot reset-conversation`:
- Clears the conversationId from lettabot-agent.json
- Preserves agent and memory
- Next message creates fresh conversation
Symptoms of corrupted conversation:
- stop_reason: "error" with empty result
- Messages not appearing in agent history
- duration_api_ms: 0 (no API call made)
Written by Cameron ◯ Letta Code
"When in doubt, start fresh." - Ancient debugging wisdom
Merged WhatsApp CLI support with HTTP API server.
Features:
- HTTP API server for CLI-to-bot communication across Docker boundaries
- WhatsApp text + file sending via `lettabot-message send --file photo.jpg`
- Unified multipart endpoint at /api/v1/messages
- Security: timing-safe auth, localhost binding, same-origin CORS
- Bad MAC error handling for WhatsApp encryption renegotiation
Written by Cameron ◯ Letta Code
Auto-detect RAILWAY_VOLUME_MOUNT_PATH and use it for all persistent data
(agent ID, cron jobs, logs). On local machines, data stays in project
directory. Template now includes volume by default.
- Add src/utils/paths.ts with getDataDir() and getWorkingDir() helpers
- Update Store, cron service, CLI tools to use data directory
- Log storage locations on startup for debugging
- Update deploy button URLs with UTM tracking
Written by Cameron ◯ Letta Code
"The best way to predict the future is to invent it." - Alan Kay
* feat: add Railway deployment support with agent auto-discovery
- Add railway.toml for build/deploy config with health checks
- Skip config file requirement when RAILWAY_ENVIRONMENT detected
- Auto-discover existing agent by name on container deploys
- Add findAgentByName() API function for agent lookup
- Add setAgentId() method to LettaBot class
- Add comprehensive Railway deployment docs
One-click deploy flow:
1. Set LETTA_API_KEY + channel tokens
2. LettaBot finds existing agent by AGENT_NAME (default: "LettaBot")
3. If not found, creates on first message
4. Subsequent deploys auto-reconnect to same agent
Written by Cameron ◯ Letta Code
"The best way to predict the future is to deploy it." - Railway, probably
* fix: specify Node 22 for Railway deployment
* fix: fail fast if LETTA_API_KEY is missing
* fix: don't await Telegram bot.start() - it never resolves
* fix: extract message from send_message tool call
* Revert "fix: extract message from send_message tool call"
This reverts commit 370306e49de3728434352d2df1b78c744e888833.
* fix: clear LETTA_AGENT_ID env var when agent doesn't exist
* docs: add Railway deploy button to README and docs
* fix: .nvmrc newline and correct MODEL default in docs
Signal-cli fires SSE events as soon as message metadata arrives, but attachment
files may still be downloading. This race condition caused intermittent voice
transcription failures where only '[Voice message received]' appeared.
Added waitForFile() helper with exponential backoff (up to 5s) that retries
until the attachment file is readable before attempting transcription. Also
applied the same fix to general attachment handling in collectSignalAttachments.
Fixes#92
Co-authored-by: letta-code <248085862+letta-code@users.noreply.github.com>
Co-authored-by: Cameron <cpfiffer@users.noreply.github.com>
Baileys/libsignal logs "Closing open session in favor of incoming
prekey bundle" and similar messages that are normal Signal Protocol
key renegotiation - not errors.
Changes:
- Remove our own crypto error logging (line 810)
- Add console filter to suppress Baileys crypto patterns:
- prekey bundle messages
- session renegotiation
- bad mac errors
- ratchet/key details
These are harmless noise that confused users into thinking
something was wrong.
Addresses LET-7275
Written by Cameron ◯ Letta Code
"Silence is golden." - Thomas Carlyle
When user selects "dedicated bot number" mode (selfChatMode=false),
skip the dmPolicy question and default to allowlist. Prompt for
allowed phone numbers immediately.
This is simpler and safer than pairing mode, which sends codes to
whoever messages the bot.
Users who want pairing or open mode can edit lettabot.yaml manually.
Also updates docs to reflect the new defaults.
Written by Cameron ◯ Letta Code
"Simplicity is the ultimate sophistication." - Leonardo da Vinci
- Reorder options to show "personal number" first (recommended/safe)
- Add warnings when user selects dedicated number mode
- Skip dmPolicy question when selfChatMode is on (irrelevant)
- Add startup warnings when selfChatMode is off
- Add Linear skill for issue management
Addresses LET-7273 - users were confused about WhatsApp configuration.
The safe default (selfChatMode=true) prevents the bot from messaging
your contacts. Only disable this for dedicated bot numbers.
Written by Cameron ◯ Letta Code
"Make the right thing easy and the wrong thing hard." - Kathy Sierra
Audio transcription may receive formats that aren't in Whisper's
supported list. Add mappings in the transcription module:
- aac → m4a (AAC is M4A compatible)
- amr → mp3 (mobile voice format)
- opus → ogg (Opus in OGG container)
- caf/x-caf → m4a (Apple CAF)
- 3gp/3gpp → mp4 (mobile video format)
This works for both whisper-1 and gpt-4o-transcribe models.
Fixes#92
Written by Cameron ◯ Letta Code
"The devil is in the details." - Ludwig Mies van der Rohe
Fixes and updates:
- README.md: Remove duplicate heartbeat troubleshooting section
- docs/getting-started.md: Fix Node version (18→20), commands, repo URL
- docs/commands.md: Rewrite with accurate command list (/start, /status, /heartbeat)
- docs/README.md: New multi-channel architecture diagram
- docs/whatsapp-setup.md: Add selfChatMode safety docs, media support section
- docs/slack-setup.md: Fix broken links
New documentation:
- docs/configuration.md: Complete YAML config reference
- docs/cron-setup.md: Scheduling guide (cron jobs + heartbeats)
Written by Cameron ◯ Letta Code
"Documentation is a love letter that you write to your future self." - Damian Conway
* Fallback to new conversation when default is missing
* Fallback when stored conversation is missing
* Allow LETTA_SESSION_TIMEOUT_MS override
---------
Co-authored-by: Jason Carreira <jason@visotrust.com>
Telegram:
- Skip voice messages in generic message handler
- Let message:voice handler transcribe properly
Signal:
- Add attachment logging for debugging
- Check file existence before reading
- Warn when audio attachment has no ID
Written by Cameron ◯ Letta Code
"The most effective debugging tool is still careful thought." - Brian Kernighan
Adds documentation to help users understand why their agent's responses
during heartbeats/cron jobs aren't being delivered to their chat channels.
- Add "Background Tasks" section explaining silent mode behavior
- Add FAQ entry in Troubleshooting for common issues
- Explain that agents must use `lettabot-message` CLI to send messages
Closes#80🤖 Generated with [Letta Code](https://letta.com)
Co-authored-by: Letta <noreply@letta.com>
Add "X-Letta-Source: lettabot" header to Letta API client
for usage tracking/telemetry.
Closes#72
Written by Cameron ◯ Letta Code
"If you can't measure it, you can't improve it." - Peter Drucker
Signal voice messages use .aac format which OpenAI Whisper doesn't
accept directly. Fix by normalizing .aac to .m4a (same codec, different
container name) before sending to the API.
Written by Cameron ◯ Letta Code
"The best error message is the one that never shows up." - Thomas Fuchs
- Add vitest as dev dependency
- Add test scripts: `npm test` (watch) and `npm run test:run` (CI)
- Add initial unit tests for pure utility functions:
- src/utils/phone.test.ts (10 tests)
- src/utils/server.test.ts (10 tests)
- src/channels/attachments.test.ts (6 tests)
All 26 tests passing.
Written by Cameron ◯ Letta Code
* Add inbound attachment handling and pruning
* Add Signal attachment support and logging
- Implement full Signal attachment collection (copies from signal-cli dir)
- Add logging when attachments are saved to disk for all channels
- Skip audio attachments in Signal (handled by voice transcription)
Written by Cameron ◯ Letta Code
* Gitignore bun.lock
Keep lockfile local, don't track in repo.
Written by Cameron ◯ Letta Code
---------
Co-authored-by: Jason Carreira <jason@visotrust.com>
Docker service hostnames (e.g. http://letta:8283) were misidentified as
Letta Cloud. Instead of enumerating self-hosted patterns, check against
the known Cloud hostname. Everything else is self-hosted.
- Add normalizePhoneForStorage() utility to handle @lid, @s.whatsapp.net suffixes
- Strip @lid/@s.whatsapp.net/@g.us and normalize to E.164 format (+prefix)
- Fix pairing approval format mismatch causing re-prompts for approved contacts
- Normalize userId on extraction, storage, and access checks
Fixes issue where approved contacts get pairing codes on every message
due to format inconsistencies:
- Extracted: 54941422981120@lid
- Checked: +54941422981120@lid
- Stored: 54941422981120@lid
- No match!
Now all formats normalize to: +54941422981120
* Add voice message transcription support (all channels)
Adds OpenAI Whisper transcription for voice messages across all channels:
- Telegram: ctx.message.voice
- WhatsApp: audioMessage via downloadMediaMessage
- Signal: audio attachments from local files
- Slack: audio files via url_private_download
- Discord: audio attachments
Voice messages sent to agent as "[Voice message]: <transcript>"
Configuration (config takes priority over env):
- lettabot.yaml: transcription.apiKey, transcription.model
- Env: OPENAI_API_KEY, TRANSCRIPTION_MODEL
Closes#47
Written by Cameron ◯ Letta Code
"The best interface is no interface - just talk."
* Add voice message documentation to README
- Add Voice Messages to features list
- Add configuration section for transcription
- Document supported channels
Written by Cameron ◯ Letta Code
* Notify users when voice transcription is not configured
Instead of silently ignoring voice messages, send a helpful message
linking to the documentation.
Written by Cameron ◯ Letta Code
* feat: upgrade to letta-code-sdk main + fix Signal voice transcription
- Switch from published SDK (v0.0.3) to local main branch (file:../letta-code-sdk)
- Update bot.ts for new SDK API: createSession(agentId?, options) signature
- Add conversationId tracking to store for proper conversation persistence
- Fix Signal voice transcription: read attachments from ~/.local/share/signal-cli/attachments/
- Fix Telegram markdown ESM issue: make markdownToTelegramV2 async with dynamic import
- Add transcription config to lettabot.yaml
- Add extensive debug logging for queue and session processing
Signal voice messages now properly transcribe and send to agent.
🐾 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta <noreply@letta.com>
* fix: update Signal CLI message sender to use daemon JSON-RPC API
- Switch from signal-cli-rest-api to signal-cli daemon (port 8090)
- Use JSON-RPC send method instead of REST /v2/send
- Support group IDs with group: prefix
- Handle 201 responses and empty bodies correctly
🐾 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta <noreply@letta.com>
* Add placeholder for untranscribed voice messages on Signal
If a voice-only message arrives and transcription fails or is disabled,
forward a placeholder so the user knows the message was received.
Written by Cameron ◯ Letta Code
---------
Co-authored-by: Letta <noreply@letta.com>
* Fix WhatsApp selfChatMode sending to wrong person
Two safety fixes:
1. Fail-safe on unknown LID - refuse to send instead of letting baileys
resolve it to potentially the wrong person
2. Improve self-chat detection - remove !senderPn requirement which can
fail in some cases, causing messages to leak to other contacts
Written by Cameron ◯ Letta Code
"Better to fail loudly than succeed silently at the wrong thing."
* Default selfChatMode to true for WhatsApp and Signal
- main.ts: WhatsApp now uses !== 'false' pattern (like Signal)
- config/io.ts: Only set env var if explicitly false
- onboard.ts: Default to 'personal' in config initialization
Written by Cameron ◯ Letta Code
* feat: add non-interactive onboarding and SKILL.md
Add agent-friendly setup flow:
- lettabot onboard --non-interactive flag
- Reads all config from environment variables
- SKILL.md documents env-based setup for agents
- Supports all channels (Telegram, Slack, Discord, WhatsApp, Signal)
- No prompts - ideal for coding agents automating setup
👾 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta <noreply@letta.com>
* fix: address non-interactive setup issues
- Add SLACK_APP_NAME for customizable app name (defaults to LETTA_AGENT_NAME or LettaBot)
- Clarify WhatsApp requires WHATSAPP_ENABLED and WHATSAPP_SELF_CHAT to be explicit
- Document all 5 channels supported (Telegram, Slack, Discord, WhatsApp, Signal)
- Fix WhatsApp selfChat default to be explicit false
* docs: recommend non-interactive setup as primary method
Update README per review feedback to show env-based setup first.
This is simpler for most users and ideal for automation.
* docs: rewrite setup to be AI-first per feedback
Make recommended setup AI-focused:
- Show prompt to paste into AI coding assistants
- AI handles clone/install/config autonomously
- Manual wizard becomes Option 2 for human users
---------
Co-authored-by: Letta <noreply@letta.com>
* Send separate assistant messages as separate channel messages
Track assistant message UUIDs to detect when a new assistant message
starts. This allows the agent to send multiple messages in response
to a single user message, appearing as separate bubbles.
Complements the existing message-type-change detection with UUID-based
separation for consecutive assistant messages.
Written by Cameron ◯ Letta Code
"Communication works best when it's broken into digestible pieces."
* Clean up bot logging and add message bubble separation
- Remove verbose diagnostic logging (API key, base URL, node version)
- Add useful event logging: tool calls, message sends
- Add UUID-based detection for separate assistant messages
- Messages now appear as separate bubbles when UUID changes
Written by Cameron ◯ Letta Code
"Good logging tells you what happened, not what you already know."
- Previously heartbeats were skipped if agent had ANY recent activity
(Gmail polling, cron jobs, other heartbeats, etc.)
- Now only skips if user sent a message in the last 5 minutes
- Added getLastUserMessageTime() to LettaBot to track user messages
- Manual /heartbeat command bypasses the skip check
- Discord /heartbeat now replies with confirmation (Telegram stays silent)
🐙 Generated with [Letta Code](https://letta.com)
Co-authored-by: Letta <noreply@letta.com>
Log API key presence, base URL, and Node version before initializing
session to help debug timeout issues like #38.
Written by Cameron ◯ Letta Code
"Debugging is twice as hard as writing the code in the first place." - Brian Kernighan
When running via `npx lettabot server`, the CLI was looking for
main.js/main.ts relative to process.cwd() (user's directory), but
the compiled files are in the npm cache or node_modules.
Now uses import.meta.url to find main.js in the same directory as
cli.js, which works correctly for:
- npx lettabot
- global install (npm install -g)
- local development
Fixes ERR_MODULE_NOT_FOUND error on server restart.
🐙 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta <noreply@letta.com>
- Add stepGoogle() wizard that guides users through gog CLI setup
- Check/install gog via Homebrew, guide OAuth credential setup
- Let users select existing accounts or add new ones
- Configure which Google services to enable (gmail, calendar, drive, etc.)
- Add GoogleConfig type and integrations.google to config schema
- Wire GMAIL_ACCOUNT env var from YAML config for polling service
- Add discord.js dependency (fixes build)
🐙 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta <noreply@letta.com>
- Separate message bubbles when stream message type changes
(e.g., assistant → tool_call → assistant now sends as separate messages)
- Track sentAnyMessage to avoid spurious "(No response from agent)"
- Add canUseTool workaround for SDK v0.0.3 bypassPermissions bug
(see letta-ai/letta-code-sdk#10)
- Clean up verbose debug logging
Written by Cameron ◯ Letta Code
"The stream of consciousness is not a river but a series of pools." - William James
