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The Neo.mjs Agent OS is the repository Brain: source code and services for Memory Core, Knowledge Base, Active Hybrid GraphRAG, DreamService, Golden Path synthesis, A2A coordination, and Neural Link tooling.

Frontmatter

id	13204
title	Extended-NL Leaf C (part 1): parseAgentEnvelope threads the Bridge sessionId
state	Closed
labels	enhancementaiarchitecture
assignees	neo-opus-ada
createdAt	Jun 14, 2026, 10:42 AM
updatedAt	Jun 14, 2026, 2:00 PM
githubUrl	https://github.com/neomjs/neo/issues/13204
author	neo-opus-ada
commentsCount	0
parentIssue	13167
subIssues	[]
subIssuesCompleted	0
subIssuesTotal	0
blockedBy	[]
blocking	[]
closedAt	Jun 14, 2026, 2:00 PM

Extended-NL Leaf C (part 1): parseAgentEnvelope threads the Bridge sessionId

Closed v13.1.0/archive-v13-1-0-chunk-2 enhancementaiarchitecture

neo-opus-ada commented on Jun 14, 2026, 10:42 AM

Context

The identity transport is complete on dev: Leaf A auth (#13181) + the (1b) sidecar emit (#13196/#13199) merged — the Bridge now stamps {type:'agent_message', agentId, sessionId, message} with a per-connection sessionId. But src/ai/parseAgentEnvelope.mjs (Leaf B, #13173) still extracts only agentId into the request context, silently dropping the sessionId. WriteGuard's writer identity is the (agentId, sessionId) pair (LockRegistry requires a non-empty sessionId), so the enforcement leaf cannot key correctly until the Client threads both.

This is the first, mechanical slice of Leaf C (the WriteGuard enforcement, #13056 / #13167 row 4–6): thread the sessionId so it reaches the write services. The enforcement itself (InstanceService → WriteGuard.requestWrite + the agent_disconnected → releaseAll wiring) is the follow-up slice.

The Fix

src/ai/parseAgentEnvelope.mjs: for an agent_message frame, also validate + extract sessionId (same shape as agentId: non-empty string → value, else null fail-closed marker), returning context: {agentId, sessionId}. The bare/legacy path is unchanged (context: null).

Forward-compatible: nothing consumes sessionId yet, but the merged (1b) emit already supplies it, so this closes the drop. A null sessionId (absent/malformed) is a fail-closed marker so the enforcement leaf denies rather than mutates.

Contract Ledger Matrix

Target Surface	Source of Authority	Proposed Behavior	Fallback	Docs	Evidence
`parseAgentEnvelope` context	this ticket	`{agentId, sessionId}` for `agent_message` (both validated, `null` fail-closed)	bare frame → `context: null` (unchanged)	JSDoc + spec	`(1b)` emit verified on `dev` to carry `sessionId`

Acceptance Criteria

An agent_message with a valid sessionId → context: {agentId, sessionId}.
A missing / empty / non-string sessionId → context: {agentId, sessionId: null} (fail-closed).
The bare / legacy path is unchanged (context: null).
Spec green; node --check.

Out of Scope

The WriteGuard.requestWrite enforcement + releaseAll disconnect wiring (the next Leaf C slice).

Sub of #13167 (Extended-NL umbrella, row 3 extension) / #13056. Consumes the (1b) emit #13196/#13199; precedes the enforcement slice.

Live latest-open sweep: checked immediately before filing; no equivalent.

Authored by Claude Opus 4.8 (Claude Code), @neo-opus-ada. Origin Session ID: 4c598c8f-d8a7-4288-9420-e825a45d310e