@everme/agent-sdk

The createToolEventBuffer tool spool preserves complete serialized input and output fields, including empty strings; it does not apply the ordinary-message 8000-character budget. Its existing total file-size policy is unchanged. Hosts must validate their native tool contract before appending events.

Shared core for every EverMe AI-agent plugin. Host-agnostic — talks to the EverMe gateway (/api/v1/mem/* + presign + S3 multipart) and nothing else. Per-host concerns (MCP framing, OpenClaw lifecycle, Claude Code hooks, …) live in their own packages and depend on this SDK.

Why this exists

EverMe ships one plugin per AI-agent host so each can iterate independently:

| Package | Host | Format | |---|---|---| | @everme/memory-mcp | Cursor / Cline / generic MCP host | MCP server (stdio / JSON-RPC) | | @everme/openclaw | OpenClaw | ContextEngine plugin (in-process module) | | @everme/claude-code | Claude Code | Native plugin (hooks + commands + skills + MCP) |

Without a shared SDK each plugin would reimplement the EverMe wire protocol — duplicating redaction, search/context shaping, agent-memory writes, and the inevitable bugs in each. The SDK is the single source of truth for "how to talk to the EverMe gateway", and every host plugin is a thin adapter on top.

Exports

import {
  // HTTP layer
  createClient, EvermeError, redactError,
  // Agent-memory realtime writes
  saveAgentMemory, AGENT_MEMORY_ROLES, AGENT_MEMORY_TOOL_CALL_TYPES,
  // Search / context
  searchMemory, getContext,
  // Config (env + host-config merge)
  resolveConfig, assertConfigUsable, TIMEOUT_MS, UPLOAD_TIMEOUT_MS,
  // Prompt helpers
  buildMemoryPrompt, MEMORY_TYPES, MEMORY_TYPE_LABELS,
  // Message helpers
  extractText, toText, stripChannelMetadata, isSessionResetPrompt,
} from "@everme/agent-sdk";

Wire contract

POST /api/v1/mem/search            → {items, profiles, rawMessages, agentMemory}
POST /api/v1/mem/context           → {profile, cachedAt, generatedAt}  // body: { forceRefresh?: bool }
POST /api/v1/mem/agent-memory      → {status, messageCount, flushed}

Auth: Authorization: Bearer <emk_*|evt_*>.

The envelope every endpoint follows:

{ error, requestId, status, result }   // status === 0 → success, return result

Write sync contract: /mem/agent-memory accepts flush (synchronous add on every batch + extraction flush) and sync (synchronous add only, no flush). saveAgentMemory sets sync: true on the leading requests of a multi-request upload whose flush rides the final request, so earlier batches keep the synchronous-add guarantee. The hook runtime also sets sync: true on every enqueue, so checkpoints and later cadence/boundary flushes follow a completed add rather than merely an accepted asynchronous job. Direct SDK callers can opt into this with sync: true; plain flush: false calls stay asynchronous. This ordering guarantee requires a gateway supporting the existing sync field; older servers that ignore it cannot provide the guarantee. flushed on the result means the flush was issued — status / extracted are the materialisation signals, and status: "no_extraction" means the upstream queued the session without extracting yet.

Uploads above 500 messages are split in source order, preferring a completed turn, then a complete tool-call/result group, then the hard message limit. Tool result text is not capped to 8000 characters by the shared writer; host-side parsing/redaction still applies. Ordinary user/assistant text and personal-memory text retain their existing budgets. Server request-size limits still apply, and a tool result must remain a single message, not several same-ID result fragments.

User and assistant text keep literal protocol examples, metadata quotes, and timestamps; the shared writer does not treat those strings as user-channel envelopes. This applies to both agent-memory and personal-memory writes. Host adapters remain responsible for excluding actual control records using their native source structure. Existing whitespace normalization and text budgets remain. extractText provides plain text extraction without envelope heuristics for host write adapters. toText and stripChannelMetadata retain their existing query-normalization behavior; they must not reclassify native conversation text.

An assistant message only closes a turn when followed by a user/new turnId, or when the adapter supplies turnComplete: true, and no calls remain pending. An explicit turnComplete: false marks commentary or execution records and prevents those records from being used as turn endings. Input exhaustion alone does not prove completion. turnId remains local. An explicit boolean turnComplete on assistant messages is also sent to the EverMe gateway so its byte-based batching can use the same source evidence. The gateway consumes this optional field without forwarding it to EverOS. Older clients omit it and keep their existing behavior; older gateways ignore it and therefore do not gain this byte-boundary improvement. Forced splits preserve actual messages without inventing missing results or endings.

Request id contract: createClient generates a UUID per request and sends it as the requestId header; the gateway reuses a valid inbound value, so plugin stderr, EverMe ELK, and the cloud platform's log search all join on one id. client.requestWithMeta(...) resolves to { result, requestId }; the wrapper helpers (searchMemory / getContext / saveAgentMemory / savePersonalMemory) surface the same id on their results, and EvermeError carries it (err.requestId, rendered by err.describe() / describeError(err)).

Tool-result content is converted to text with leading/trailing whitespace trimmed, but channel metadata patterns are not removed: tool output can contain literal protocol examples, log timestamps, or message IDs. The same literal-content rule applies to user and assistant messages as described above.

Adapter turn boundary

Adapters that write through readStoreBatches must say whether one hook invocation is one logical turn:

export const myAdapter = { platform: "my-host", turnBoundary: "stop", /* ... */ };

With turnBoundary: "stop" the SDK claims channel: "hook" on every batch of a Stop and declares turns: 1 on the last one (earlier batches carry turns: 0), which is what puts the host's writes in the L1-2 capture-completeness denominator. Leave it unset for whole-session hosts that upload at SessionEnd: they run no per-turn delivery marker, cannot report lost turns, and must not enter a denominator whose losses they can never reach. The simple readLastTurn path always claims the channel; it is per-turn by construction.

Env-file precedence

The shared hook runtime merges the host's everme.env file into the process env. File values never override variables already set in the shell — except EVERME_AGENT_TOKEN and EVERME_AGENT_ID, where the file wins. This asymmetry is deliberate: evercli rotates the per-machine evt token by rewriting everme.env, and a stale token exported in the shell must not shadow the rotated credential.

Concurrency / safety contracts

• Retry: execWithRetry retries transport failures once — but only for GET/HEAD. POST writes (/mem/agent-memory) surface the transport error so the caller can decide; retrying a POST after a mid-flight drop can duplicate writes.
• Redaction: redactError scrubs evt_*, emk_*, X-Amz-Signature/Credential/Security-Token, and AWS access key ids. Apply at every error sink before passing to host stderr / model context.
• Timeouts: EvermeError{type:"timeout"} is thrown so callers can branch on it (e.g. degrade to fallback) rather than retrying as if it were a transport blip. Body-read timeouts are caught too — a stuck body no longer silently parses as null.

Tests

npm test

Covers HTTP envelope, retry gating, config precedence, message normalization, agent-memory shaping.

License

Apache-2.0

Task-aware batching

saveAgentMemory accepts optional syncScope for native fragment progress. Scoped writes check /mem/agent-memory/state before sending any batch: hook writes require hookSyncScopeSupported: true, import writes require syncScopeSupported: true. All batches retain the scope; older servers fail without writing. Unscoped calls and separate session flushes keep their original protocol. This field does not change the upstream conversation identity and cannot be combined with deduplication.

saveAgentMemory also forwards optional deduplication: "client-native-id" on every batch for native-identity-checkpointed hooks (currently QwenWork). It requires a supporting Server, channel: "hook", no baseTurn, and no offline. Other values/combinations are rejected by Server. The default stays positional. Native-ID selection is client-owned; Server bypasses positional watermarks rather than storing per-message identities. It does not guarantee cross-channel deduplication or exactly-once POST retries. Transcript checkpoint commit(stateId, uploadedCount, { nativeMessageIds }) persists optional local identity keys only after successful upload; count-only callers are unchanged.

saveAgentMemory accepts optional taskBatching: true; hook adapters opt in with the same property. Currently only Codex enables it. Other callers retain the existing batching path. This is a local SDK option, never a wire field.

The strategy plans user tasks, preserves fitting original results, compresses only byte-oversized tasks with 4/3/2 KiB UTF-8 tool-result budgets, then splits remaining overflow with text/pair/hard-boundary priority. It uses a 64 KiB soft target, 280 KiB message budget and 500-message cap. It preserves message count, order and source metadata, so baseTurn/turns and final-batch flush behavior stay on the existing upload path. Hard fallback is not a guarantee of closed tasks.