fix: parse session_id from stderr — hermes --quiet writes it there #348

2026-05-18T17:06:08Z

xiaoju commented

2026-05-18 17:06:08 +00:00

What

Parse session_id from stderr in addition to stdout.

Why

Verified on Mac: hermes chat --quiet outputs session_id: xxx to stderr, AI response to stdout. The agent only parsed stdout → session_id never found → detail fell back to raw output (previously empty string, now has content after #347 but still not the full merkle session detail).

Evidence

$ spawn("hermes", ["chat", "-q", "say hi", "--quiet"], { stdio: ["ignore", "pipe", "pipe"] })
stdout: "Hi! How can I help you today?\n"
stderr: "\nsession_id: 20260519_010509_1a6573\n"

Changes

hermes.ts — spawnHermesChat returns { stdout, stderr } instead of just stdout
runHermes — checks stderr first for session_id, falls back to stdout

Ref

Refs #342

## What Parse session_id from stderr in addition to stdout. ## Why Verified on Mac: `hermes chat --quiet` outputs `session_id: xxx` to **stderr**, AI response to **stdout**. The agent only parsed stdout → session_id never found → detail fell back to raw output (previously empty string, now has content after #347 but still not the full merkle session detail). ## Evidence ``` $ spawn("hermes", ["chat", "-q", "say hi", "--quiet"], { stdio: ["ignore", "pipe", "pipe"] }) stdout: "Hi! How can I help you today?\n" stderr: "\nsession_id: 20260519_010509_1a6573\n" ``` ## Changes - `hermes.ts` — `spawnHermesChat` returns `{ stdout, stderr }` instead of just stdout - `runHermes` — checks stderr first for session_id, falls back to stdout ## Ref Refs #342

xiaoju added 1 commit 2026-05-18 17:06:09 +00:00

fix: parse session_id from stderr (hermes --quiet writes it there) cf9e2cd3d6

hermes --quiet outputs session_id to stderr and AI response to stdout.
The agent was only parsing stdout, so session_id was never found and
detail always fell back to raw output.

Now checks stderr first, then stdout as fallback.

xiaomo approved these changes 2026-05-18 17:10:29 +00:00

xiaomo left a comment

LGTM ✅ stderr 优先查找 session_id，stdout fallback，detail 存纯 stdout。治本了。

xiaomo merged commit 8b43f7993b into main

2026-05-18 17:10:30 +00:00

xiaomo referenced this issue from a commit

2026-05-18 17:10:31 +00:00

Merge pull request 'fix: parse session_id from stderr — hermes --quiet writes it there' (#348) from fix/348-session-id-stderr into main

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Reference: uncaged/workflow#348