Michael Suchacz d1a471e29e fix(coderd/x/chatd): retune subagent selection guidance (#25311) ...

> Mux working on behalf of Mike.

## Summary

- retune chatd subagent guidance to prefer `general` for substantial
delegated work, including read-only synthesis and planning support
- narrow `explore` guidance to repository-local code lookup and bounded
tracing
- add regression tests for planning, spawn tool, and Plan Mode guidance
text

## Tests

- `go test ./coderd/x/chatd -run
'Test(DefaultSystemPromptPlanningGuidance_SteersSubagentSelection|SpawnAgent_DescriptionSteersGeneralForSubstantialResearch|SpawnAgent_PlanModeDescriptionOmitsComputerUse|PlanningOverlaySubagentGuidance_UsesPlanModeSafeDescriptions|ExploreSubagentIsReadOnly)$'`
- `make lint`
- `make test TEST_PACKAGES=./coderd/x/chatd RUN=Guidance && make test
TEST_PACKAGES=./coderd/x/chatd RUN=Description`
- pre-commit hook during `git commit`

2026-05-13 23:10:21 +02:00

..

chatadvisor

feat: stream advisor tool output (#25032)

2026-05-11 20:18:49 +02:00

chatcost

chore: move chatd and related packages to /x/ subpackage (#23445)

2026-03-23 17:34:43 +00:00

chatdebug

test: stabilize chatdebug heartbeat threshold test (#25022)

2026-05-07 17:12:14 +10:00

chaterror

fix(coderd/x/chatd/chaterror): deflake TestClassify_ParsesRetryAfterHTTPDate (#25128)

2026-05-11 19:09:51 +02:00

chatloop

fix(coderd/x/chatd): discover workspace MCP tools mid-turn after create_workspace (#25169)

2026-05-12 00:30:56 -04:00

chatopenai

feat: add computer-use provider selection for AI agents (#24772)

2026-05-04 20:30:50 +02:00

chatprompt

refactor: add dbgen chat generators and migrate test boilerplate (#24497)

2026-05-01 13:29:33 +01:00

chatprovider

fix(coderd/x/chatd): handle truncated provider streams (#25074)

2026-05-08 15:52:42 +10:00

chatretry

fix(coderd/x/chatd): handle truncated provider streams (#25074)

2026-05-08 15:52:42 +10:00

chatsanitize

fix(coderd/x/chatd): repair Anthropic provider tool history (#24744)

2026-04-28 12:45:23 +02:00

chattest

refactor(coderd/x/chatd): extract OpenAI logic into chatopenai package (#24788)

2026-05-04 11:17:19 +02:00

chattool

feat(coderd): add stop_workspace chatd tool and recovery classification (#24997)

2026-05-11 16:23:07 +10:00

chatutil

refactor(coderd/x/chatd): extract OpenAI logic into chatopenai package (#24788)

2026-05-04 11:17:19 +02:00

internal/agentselect

feat: suffix-based chat agent selection (#23741)

2026-03-30 11:43:59 +00:00

mcpclient

feat: add opt-in Coder identity headers for MCP servers (#25153)

2026-05-12 08:54:53 -04:00

advisor_internal_test.go

fix: remove advisor reasoning configuration (#25030)

2026-05-07 15:19:19 +02:00

attachments_test.go

feat(coderd/x/chatd): agent-created file attachments in chat (#24280)

2026-04-20 18:04:35 +10:00

attachments.go

feat(site): display file attachments in chat UI (#24281)

2026-04-22 20:11:53 +10:00

chatd_debug.go

feat(coderd): wire debug logging into chat lifecycle (#23917)

2026-04-20 12:27:16 +02:00

chatd_internal_test.go

fix: drop buffered chat parts after their durable message commits (#25164)

2026-05-12 00:30:38 -04:00

chatd_test.go

fix: allow changing model when editing earlier chat message (#25084)

2026-05-12 14:51:55 +02:00

chatd.go

feat: add opt-in Coder identity headers for MCP servers (#25153)

2026-05-12 08:54:53 -04:00

chatfile_internal_test.go

feat: resize chat image attachments client-side for provider budgets (#24533)

2026-05-08 02:07:33 +10:00

computer_use.go

feat: add computer-use provider selection for AI agents (#24772)

2026-05-04 20:30:50 +02:00

configcache_test.go

feat(coderd): wire advisor runtime to admin config (#24622)

2026-04-30 15:07:33 +02:00

configcache.go

feat(coderd): wire advisor runtime to admin config (#24622)

2026-04-30 15:07:33 +02:00

contextparts.go

feat: add CLI commands for managing chat context from workspaces (#24105)

2026-04-09 16:33:00 +02:00

dialvalidation_test.go

fix(coderd/x/chatd): prevent chat hang when workspace agent is unavailable (#23707)

2026-03-27 18:47:39 +11:00

dialvalidation.go

fix(coderd/x/chatd): prevent chat hang when workspace agent is unavailable (#23707)

2026-03-27 18:47:39 +11:00

dynamictool_internal_test.go

feat: add dynamic tools support for chat API (#24036)

2026-04-08 11:54:44 -04:00

dynamictool.go

feat: add dynamic tools support for chat API (#24036)

2026-04-08 11:54:44 -04:00

export_test.go

test(coderd): centralize chat test harness and stabilize flakes (#25171)

2026-05-12 22:13:55 +10:00

instruction_test.go

fix: re-fetch context files and skills from workspace on each turn (#24360)

2026-04-15 16:41:15 -04:00

instruction.go

feat: add CLI commands for managing chat context from workspaces (#24105)

2026-04-09 16:33:00 +02:00

integration_responses_test.go

test(coderd/x/chatd): skip stale notification flakes (#25177)

2026-05-12 14:50:30 +02:00

integration_test.go

chore: remove agents experiment flag and mark feature as beta (#24432)

2026-05-01 01:49:00 +10:00

personal_model_override_test.go

feat: add personal chat model overrides (#24715)

2026-05-05 00:57:51 +02:00

personal_model_override.go

feat: add personal chat model overrides (#24715)

2026-05-05 00:57:51 +02:00

prompt.go

refactor: unify subagent spawn behind spawn_subagent (#24535)

2026-04-21 14:01:32 +02:00

quickgen_test.go

feat(coderd/x/chatd): add compact turn status labels (#25043)

2026-05-11 17:09:42 +02:00

quickgen.go

feat(coderd/x/chatd): add compact turn status labels (#25043)

2026-05-11 17:09:42 +02:00

recording_internal_test.go

refactor: add dbgen chat generators and migrate test boilerplate (#24497)

2026-05-01 13:29:33 +01:00

recording.go

feat(site): display file attachments in chat UI (#24281)

2026-04-22 20:11:53 +10:00

sanitize_test.go

fix: strip invisible Unicode from prompt content (#23525)

2026-03-25 14:09:24 +00:00

sanitize.go

fix: strip invisible Unicode from prompt content (#23525)

2026-03-25 14:09:24 +00:00

store_chat_attachment_test.go

feat(site): display file attachments in chat UI (#24281)

2026-04-22 20:11:53 +10:00

store_chat_attachment.go

feat(site): display file attachments in chat UI (#24281)

2026-04-22 20:11:53 +10:00

streamcollector_internal_test.go

fix(coderd/x/chatd): checkpoint buffered message_parts to avoid stale replay (#25145)

2026-05-11 17:27:03 -04:00

subagent_catalog.go

fix(coderd/x/chatd): retune subagent selection guidance (#25311)

2026-05-13 23:10:21 +02:00

subagent_context_internal_test.go

refactor: add dbgen chat generators and migrate test boilerplate (#24497)

2026-05-01 13:29:33 +01:00

subagent_internal_test.go

fix(coderd/x/chatd): retune subagent selection guidance (#25311)

2026-05-13 23:10:21 +02:00

subagent_test.go

refactor: add dbgen chat generators and migrate test boilerplate (#24497)

2026-05-01 13:29:33 +01:00

subagent.go

feat: add personal chat model overrides (#24715)

2026-05-05 00:57:51 +02:00

testhooks.go

test(coderd): centralize chat test harness and stabilize flakes (#25171)

2026-05-12 22:13:55 +10:00

title_override_test.go

feat: show agent turn summary in agents sidebar (#24942)

2026-05-06 16:43:35 +02:00

title_override.go

feat: add admin-configurable chat title generation model (#24838)

2026-05-04 13:13:00 +02:00

turn_summary_internal_test.go

feat(coderd/x/chatd): add compact turn status labels (#25043)

2026-05-11 17:09:42 +02:00

usagelimit_test.go

chore: move chatd and related packages to /x/ subpackage (#23445)

2026-03-23 17:34:43 +00:00

usagelimit.go

fix: stop group spend limits from leaking across org boundaries (#24294)

2026-04-14 16:56:17 +01:00