fix(goal): update_goal accepts a progress estimate with yield; the stage report shows

A session-export review found update_goal rejected `progress` sent with
`status: "yield"` ("progress is only accepted with status not_achieved or
advisory"). Yield means a finished stage handed back to the user, which is
exactly when a progress estimate is most useful.

- update_goal accepts `progress` with yield, and stores it on the yielded
  goal after `mark_yielded`. `record_progress` only records on an active
  goal, so it would have dropped it. The refusal text names yield. The
  schema description says "Optional with not_achieved, advisory or yield".
- The TUI shows the progress receipt for a yield too (ui/apply.rs). Paused
  and complete goals keep their last report silent; a yield is the stage
  report the user is handed back with. The schema promises the estimate is
  "shown to the user as reported progress". An adversarial review flagged
  that without this, a yield's estimate reached only the model.
- The existing progress-rejection test expects the new refusal text.
- CHANGELOG notes it, and crates/tui/CHANGELOG.md is re-synced.

Model-visible and KV-cache: one sentence of update_goal's schema
description changes, 7 bytes longer. That changes the session-pinned tool
catalog for new sessions only; a running session keeps its pinned prefix.
The 12 conformance goldens that pin the catalog were re-recorded with
CODEWHALE_CONFORMANCE_UPDATE=1 (CI unset). Normalized, their diff moves
only:
- the description text, and a fixed-width preview shifted 7 characters;
- the sha256 values and the short "frozen: <digest>" label;
- tools_bytes and payload_json_bytes, each +7;
- a `.codewhale/state/.gitignore` entry in the event goldens'
  workspace_after. That entry comes from main's 491d3df155, which writes
  that file and was committed with its tests left to CI, so main's
  golden_turn_events_match was already stale.

Evidence, on a local lib test binary (Ubuntu 24.04) built from this
branch with the goal.rs change:
- `conformance::`: test result: ok. 33 passed; 0 failed.
- `tools::goal`: test result: ok. 36 passed; 0 failed.
The ui/apply.rs condition was added after that build. cargo fmt --check
is clean, and hosted CI compiles and runs it.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01BsXVvReYca2UxzimQtj7Mj

CHANGELOG.md

@@ -232,7 +232,8 @@ launcher guidance.
 - `todo_write` returns a short receipt (counts and the item in progress) to
   the model instead of repeating the whole list on every call.
 - Goal usage counts the turn that completes, yields or blocks the goal, so
-  `tokens_used` and `time_used_seconds` no longer stay at 0.
+  `tokens_used` and `time_used_seconds` no longer stay at 0. `update_goal`
+  accepts a progress estimate with `yield`.
 - A shell command that has printed nothing for a minute still reads as
   running ("no output for 1m 05s"), keeps its Stop action and is reachable
   through the Runtime API; only a job whose process is gone after a restart

crates/tui/CHANGELOG.md

@@ -232,7 +232,8 @@ launcher guidance.
 - `todo_write` returns a short receipt (counts and the item in progress) to
   the model instead of repeating the whole list on every call.
 - Goal usage counts the turn that completes, yields or blocks the goal, so
-  `tokens_used` and `time_used_seconds` no longer stay at 0.
+  `tokens_used` and `time_used_seconds` no longer stay at 0. `update_goal`
+  accepts a progress estimate with `yield`.
 - A shell command that has printed nothing for a minute still reads as
   running ("no output for 1m 05s"), keeps its Stop action and is reachable
   through the Runtime API; only a job whose process is gone after a restart

crates/tui/src/tools/goal.rs

@@ -1160,7 +1160,7 @@ impl ToolSpec for UpdateGoalTool {
                 },
                 "progress": {
                     "type": "object",
-                    "description": "Optional with not_achieved or advisory: your current best estimate of overall completion, shown to the user as reported progress. Keep percent honest — it is an estimate, never a verified fraction.",
+                    "description": "Optional with not_achieved, advisory or yield: your current best estimate of overall completion, shown to the user as reported progress. Keep percent honest — it is an estimate, never a verified fraction.",
                     "properties": {
                         "percent": {
                             "type": "integer",
@@ -1211,9 +1211,9 @@ impl ToolSpec for UpdateGoalTool {
         }
         let status = required_str(&input, "status")?.trim().to_ascii_lowercase();
         let progress = parse_progress_report(&input)?;
-        if progress.is_some() && !matches!(status.as_str(), "not_achieved" | "advisory") {
+        if progress.is_some() && !matches!(status.as_str(), "not_achieved" | "advisory" | "yield") {
             return Err(ToolError::invalid_input(
-                "progress is only accepted with status not_achieved or advisory",
+                "progress is only accepted with status not_achieved, advisory or yield",
             ));
         }
         let snapshot = {
@@ -1272,6 +1272,9 @@ impl ToolSpec for UpdateGoalTool {
                 }
                 "yield" => {
                     state.mark_yielded().map_err(ToolError::invalid_input)?;
+                    if progress.is_some() {
+                        state.progress = progress;
+                    }
                 }
                 "advisory" => {
                     let advisory = input
@@ -2342,7 +2345,7 @@ mod tests {
             .await
             .expect_err("progress is not terminal evidence");
         assert!(
-            err.to_string().contains("not_achieved or advisory"),
+            err.to_string().contains("not_achieved, advisory or yield"),
             "{err}"
         );
 

crates/tui/src/tui/ui/apply.rs

@@ -688,9 +688,11 @@ pub(crate) fn apply_goal_snapshot_to_app(app: &mut App, snapshot: &GoalSnapshot)
     // A fresh reported-progress receipt reads like the model's own status
     // line: percent with a bar, then the optional now/next lines it wrote.
     // Paused/complete goals keep their last report silent — the lifecycle
-    // receipt already spoke.
+    // receipt already spoke — except a yield, whose progress is the stage
+    // report the user is handed back with.
     if progress_changed
-        && verdict == GoalStatus::Active
+        && (verdict == GoalStatus::Active
+            || snapshot.pause_reason == Some(crate::tools::goal::GoalPauseReason::Yielded))
         && let Some(progress) = snapshot.progress.as_ref()
     {
         let mut content = app

crates/tui/tests/fixtures/conformance/events/approval_denied.golden.jsonl

@@ -1,8 +1,8 @@
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-{"changed":false,"context_updates":0,"description":"frozen: 54603624f5a8","event":"prefix_cache_change","last_miss_reason":"","pin_reason":"initial","pinned_combined_hash":"<masked>","stability_pct":100,"system_prompt_changed":false,"tools_changed":false}
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A command still running then is not killed: it moves to the background by itself and you get its output so far, how long ago it last printed, its build phase, and a task_id. Find task_shell_wait with tool_search to read more or wait for it.\",\"type\":\"number\"}},\"required\":[\"command\"],\"type\":\"object\"}"},"mcp_serverLine truncated
 {"event":"route_dispatched","route":{"auto_model":false,"base_url":"https://api.deepseek.com/beta","billing":{"billing_mode":"metered","dispatched_at":"<timestamp>"},"billing_product":{"kind":"unproven"},"model":"deepseek-v4-pro","provider":"deepseek","provider_identity":"deepseek"},"turn_id":"<uuid:1>"}
 {"duration_ms":"<masked>","event":"turn_usage","first_token_ms":"<masked>","request_ms":"<masked>","usage":{"input_tokens":150,"output_tokens":15}}
 {"event":"tool_call_started","input":{"command":"touch denied.txt"},"tool_call_id":"<uuid:2>","tool_name":"Bash"}
@@ -12,12 +12,12 @@
 {"engine_session_id":"conformance-session","event":"session_updated","messages":[{"content":[{"text":"Create denied.txt with touch.","type":"text"},{"text":"<turn_meta>\nCurrent local date: <today>\nCurrent workspace: <WORKSPACE>\nCurrent permission posture: Ask\nCurrent sandbox posture: workspace-write (writes inside the workspace; network blocked) (local OS sandbox applied)\n## Repo Working Set\nKey files: README.md\nWhen in doubt, use tools to verify and keep changes focused on the working set.\n</turn_meta>","type":"text"}],"role":"user"},{"content":[{"execution_id":"<uuid:2>","id":"call_touch","input":{"command":"touch denied.txt"},"name":"Bash","type":"tool_use"}],"role":"assistant"},{"content":[{"content":"Error: Tool 'Bash' denied by user — the call was not approved. Do not retry the same call; present what you intended and wait for the user's approval or new instructions.","execution_id":"<uuid:2>","is_error":true,"tool_use_id":"call_touch","type":"tool_result"}],"role":"user"}],"model":"deepseek-v4-pro","system_prompt":"<pinned by the prompt family>","workspace":"<WORKSPACE>"}
 {"event":"status","message":"Continuing — tool results"}
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-{"harness_summary":{"model_requests":1,"non_streaming_requests":0,"workspace_after":{".codewhale/state/subagents.v1.lock":"e3b0c44298fc1c14","NOTES.md":"f957b19529906961","README.md":"41f49bffb38de5ba"}}}
+{"harness_summary":{"model_requests":1,"non_streaming_requests":0,"workspace_after":{".codewhale/state/.gitignore":"cdbcae15105d6b78",".codewhale/state/subagents.v1.lock":"e3b0c44298fc1c14","NOTES.md":"f957b19529906961","README.md":"41f49bffb38de5ba"}}}

crates/tui/tests/fixtures/conformance/prompt/agent_suggest.golden.json

@@ -2,8 +2,8 @@
   "system_sha256": "8ff744b8ed90564a8c4754ac79cdbaf05df69ed024cc2ec154abfe581ed72d7f",
   "system_bytes": 9183,
   "system_blocks": 5,
-  "tools_sha256": "6f1ab6f7a2f04bcf68a6e8626e97c816b560ae103e94d7642f4cd5bd9a65ab5e",
-  "tools_bytes": 14890,
+  "tools_sha256": "157b468336034c773a179ceb07859a3bf5a93a7829dc5e66ccc0e4902622d9bb",
+  "tools_bytes": 14897,
   "tool_count": 12,
   "tool_names": [
     "bash",
@@ -19,7 +19,7 @@
     "execute_tools",
     "tool_search"
   ],
-  "prefix_sha256": "387edcedb4400d61f81c294eef4e4ed2d3d3ccec07224da128c3547873356260",
+  "prefix_sha256": "3236f11da18b12c2961510681f0991a95ab4e7e33e6df6fb2785f8685d60ae42",
   "masks": [
     "<WORKSPACE>",
     "<HOME>",

crates/tui/tests/fixtures/conformance/prompt/agent_suggest.tools.golden.json

@@ -283,7 +283,7 @@
         },
         "progress": {
           "additionalProperties": false,
-          "description": "Optional with not_achieved or advisory: your current best estimate of overall completion, shown to the user as reported progress. Keep percent honest — it is an estimate, never a verified fraction.",
+          "description": "Optional with not_achieved, advisory or yield: your current best estimate of overall completion, shown to the user as reported progress. Keep percent honest — it is an estimate, never a verified fraction.",
           "properties": {
             "next": {
               "description": "One short line: what comes next.",

crates/tui/tests/fixtures/conformance/prompt/plan_mode.golden.json

@@ -2,8 +2,8 @@
   "system_sha256": "8ff744b8ed90564a8c4754ac79cdbaf05df69ed024cc2ec154abfe581ed72d7f",
   "system_bytes": 9183,
   "system_blocks": 5,
-  "tools_sha256": "50c90f2a5678c770190f12690cd9793f7c999f0b2a8013e71a43e61f03191fd0",
-  "tools_bytes": 13360,
+  "tools_sha256": "91d0b0a9b35665dc0d9e7811d5ed139e7dc761bb49f17acaff757675e27e372c",
+  "tools_bytes": 13367,
   "tool_count": 11,
   "tool_names": [
     "bash",
@@ -18,7 +18,7 @@
     "write",
     "tool_search"
   ],
-  "prefix_sha256": "e4c70ccf568cd9720d7bab82cd0d9c9e446474c2a23c2db370d113551a4fad34",
+  "prefix_sha256": "6673c1a81b34efa2d5c2a8541c7f0590d7e0dc158d11ad06fcc6b9e848b621c0",
   "masks": [
     "<WORKSPACE>",
     "<HOME>",

crates/tui/tests/fixtures/conformance/prompt/plan_mode.tools.golden.json

@@ -283,7 +283,7 @@
         },
         "progress": {
           "additionalProperties": false,
-          "description": "Optional with not_achieved or advisory: your current best estimate of overall completion, shown to the user as reported progress. Keep percent honest — it is an estimate, never a verified fraction.",
+          "description": "Optional with not_achieved, advisory or yield: your current best estimate of overall completion, shown to the user as reported progress. Keep percent honest — it is an estimate, never a verified fraction.",
           "properties": {
             "next": {
               "description": "One short line: what comes next.",

crates/tui/tests/fixtures/conformance/prompt/trusted_project_instructions.golden.json

@@ -2,8 +2,8 @@
   "system_sha256": "cd367daa552060c0b30a60263a509fdd25a0d92c89f24aa9f69c174d52076f3d",
   "system_bytes": 8757,
   "system_blocks": 5,
-  "tools_sha256": "6f1ab6f7a2f04bcf68a6e8626e97c816b560ae103e94d7642f4cd5bd9a65ab5e",
-  "tools_bytes": 14890,
+  "tools_sha256": "157b468336034c773a179ceb07859a3bf5a93a7829dc5e66ccc0e4902622d9bb",
+  "tools_bytes": 14897,
   "tool_count": 12,
   "tool_names": [
     "bash",
@@ -19,7 +19,7 @@
     "execute_tools",
     "tool_search"
   ],
-  "prefix_sha256": "57bd2508a57eea1011da97e0102b21a549ef7b49267f800400d18a2a7c304745",
+  "prefix_sha256": "54e30b4850ca16509f2e8fb4b5cbc5eccca33d4802970f1314a6e9d716ea9aa6",
   "masks": [
     "<WORKSPACE>",
     "<HOME>",

crates/tui/tests/fixtures/conformance/prompt/trusted_project_instructions.tools.golden.json

@@ -283,7 +283,7 @@
         },
         "progress": {
           "additionalProperties": false,
-          "description": "Optional with not_achieved or advisory: your current best estimate of overall completion, shown to the user as reported progress. Keep percent honest — it is an estimate, never a verified fraction.",
+          "description": "Optional with not_achieved, advisory or yield: your current best estimate of overall completion, shown to the user as reported progress. Keep percent honest — it is an estimate, never a verified fraction.",
           "properties": {
             "next": {
               "description": "One short line: what comes next.",