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fix(pty): keep bounded results actionable

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Tianyi Cui
2026-07-23 00:48:00 +08:00
parent 5ba4f77f2b
commit be20804684
8 changed files with 55 additions and 12 deletions
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packages/pty/tool-pty/README.md
+3 -3
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@@ -9,9 +9,9 @@ Six model-facing tools over `ctx.pty`: `terminal_open`, `terminal_send`, `termin
| key | default | meaning |
|---|---:|---|
| `enableRunInBackground` | `true` | expose and accept `run_in_background`; false omits the schema field and rejects a forced undeclared argument |
| `maxResultBytes` | `262144` | UTF-8 cap for each complete terminal result or PTY task output after wait, session, pagination, truncation, and task-status metadata |
| `maxResultBytes` | `262144` | UTF-8 cap (minimum `64`) for each complete terminal result or PTY task output after wait, session, pagination, truncation, and task-status metadata |
Both values are validated at load. When a result exceeds `maxResultBytes`, rendering reserves space for control metadata and a truncation marker when they fit; cuts preserve UTF-8 boundaries.
Both values are validated at load. The minimum result cap keeps every registry-issued session or task id visible in its creation acknowledgement. When a result exceeds `maxResultBytes`, rendering reserves space for control metadata and a truncation marker when they fit; cuts preserve UTF-8 boundaries.
## Model Experience
@@ -53,7 +53,7 @@ Prefix-stable while tool visibility and definitions are unchanged.
#### What the model sees
Spawn returns the id and bounded MOTD. Send/read return bounded terminal text plus readiness/history markers. Background mode returns a generic task id. Every complete result is capped by `maxResultBytes`, including generic task status text. Results remain in session history until compaction; incremental task reads do not repeat consumed output.
Spawn returns the id and bounded MOTD. Send/read return bounded terminal text plus readiness/history markers. Background mode returns a generic task id. Every complete result is capped by `maxResultBytes`, including normalized error text and generic task status text. Results remain in session history until compaction; incremental task reads do not repeat consumed output.
#### Token effect