Addresses #22833, #22245, #23067
## Why
`/goal` can keep synthesizing turns even when the next turn cannot make
meaningful progress. Hard usage exhaustion can replay failing turns, and
repeated permission or external-resource blockers can keep burning
tokens while waiting for user or system intervention.
## What changed
- Add resumable `blocked` and `usageLimited` goal states. As with
`paused`, goal continuation stops with these states.
- Move to `usageLimited` after usage-limit failures.
- Allow the built-in `update_goal` tool to set `blocked` only under
explicit repeated-impasse guidance. Updated goal continuation prompt to
specify that agent should use `blocked` only when it has made at least
three attempts to get past an impasse.
Most of the files touched by this PR are because of the small app server
protocol update.
## Validation
I manually reproduced a number of situations where an agent can run into
a true impasse and verified that it properly enters `blocked` state. I
then resumed and verified that it once again entered `blocked` state
several turns later if the impasse still exists.
I also manually reproduced the usage-limit condition by creating a
simulated responses API endpoint that returns 429 errors with the
appropriate error message. Verified that the goal runtime properly moves
the goal into `usageLimited` state and TUI UI updates appropriately.
Verified that `/goal resume` resumes (and immediately goes back into
`ussageLImited` state if appropriate).
## Follow-up PRs
Small changes will be needed to the GUI clients to properly handle the
two new states.
## Why
Users have requested the ability to edit a goal's objective after a goal
has been created. This PR exposes a new `/goal edit` command in the TUI
to address this request.
In the process of implementing this, I also noticed an existing bug in
the goal runtime. When a goal's objective is updated through the
`thread/goal/set` app server API, the goal runtime didn't emit a new
steering prompt to tell the agent about the new objective. This PR also
fixes this hole.
## What Changed
- Adds `/goal edit` in the TUI, opening an edit box prefilled with the
current goal objective.
- Keeps active and paused goals in their current state, resets completed
goals to active, keeps budget-limited goals budget-limited, and
preserves the existing token budget.
- Changes the existing `thread/goal/set` behavior so editing an
objective preserves goal accounting instead of resetting it. The older
reset-on-new-objective behavior was left over from before
`thread/goal/clear`; clients that need to reset accounting can now clear
the existing goal and create a new one.
- Reuses the existing goal set API path; this does not add or change
app-server protocol surface area.
- Adds a dedicated goal runtime steering prompt when an externally
persisted goal mutation changes the objective, so active turns receive
the updated objective.
## Validation
- Make sure `/goal edit` returns an error if no goal currently exists
- Make sure `/goal edit` displays an edit box that can be optionally
canceled with no side effects
- Make sure that an edited goal results in a steer so the agent starts
pursuing the new objective
- Make sure the new objective is reflected in the goal if you use
`/goal` to display the goal summary
- Make sure that `/goal edit` doesn't reset the token budget, time/token
accounting on the updated goal
## Summary
Early adopters of the `/goal` feature have provided feedback that they
expect a goal they explicitly paused to remain paused when they resume a
thread. Previously, resuming a thread would reactivate a paused goal.
This PR keeps persisted goal status unchanged during thread resume. This
honors the user feedback while also simplifying the core goal logic.
Rather than have the core logic automatically resume a paused goal, that
responsibility is transferred to the client. The TUI now detects a
resumed thread with a paused goal and asks the user whether to `Resume
goal` or `Leave paused`. The prompt appears only for quiet resume flows,
so users who resume with an immediate prompt are not interrupted.
<img width="544" height="111" alt="image"
src="https://github.com/user-attachments/assets/0ac9de1c-6ee6-47ba-b223-c03c8eb4c192"
/>
## Why
The paused goal statusline currently points users at `/goal` to unpause
a goal, but bare `/goal` is the summary command and does not change the
goal state. Instead of making `/goal` mutate state only when a goal is
paused, this gives the action an explicit command that reads naturally
in the UI.
## What Changed
- Replace `/goal unpause` with `/goal resume` for reactivating a paused
goal.
- Update the paused goal statusline and `/goal` summary copy to point at
`/goal resume`.
Adds the TUI user experience for goals on top of the core runtime from
PR 4.
## Why
Users need a direct TUI control surface for long-running goals. The UI
should make the current goal visible, support common goal actions
without waiting for a model turn, and avoid confusing end-of-turn
notifications while an active goal is immediately continuing.
## What changed
- Added `/goal` summary rendering for the current goal, including
active, paused, budget-limited, and complete states.
- Added `/goal <objective>` creation/replacement through the app-server
goal API rather than a model prompt.
- Added `/goal clear`, `/goal pause`, and `/goal unpause` command
variants.
- Added a confirmation menu when the user enters a new goal while
another goal already exists.
- Updated `/goal` help and summary tip text so it reflects the supported
command variants without advertising slash-command token budgets.
- Added footer/statusline goal indicators, including elapsed time and
token budget display when a budget exists from API/tool-created goals.
- Consumes goal updated/cleared notifications so the TUI stays in sync
with external app-server changes.
- Suppresses end-of-turn desktop notifications only when a goal is still
active and follow-up work is expected.
- Preserves slash-command history behavior and avoids leaking queued
`/goal` state into unrelated submissions.
## Verification
- Added TUI unit and snapshot coverage for goal command availability,
summary rendering, control commands, replacement menu behavior,
status/footer display, notification handling, and command history.
Eric Traut