Michael Suchacz 1e546ea8a3 feat(coderd/x/chatd/mcpclient): migrate external MCP client to official Go SDK (#28058) ...

## Stack Context

PR 3 of 6 in a stack that migrates every Coder MCP surface from the
archived `github.com/mark3labs/mcp-go` library to the official
`github.com/modelcontextprotocol/go-sdk` v1.7.0.

Stack: #28056 -> #28057 -> #28058 -> #28059 -> #28060 -> #28061

## Why

The chatd external MCP client (admin-configured MCP servers used by
Agent chat) now holds `*mcp.ClientSession` connections created via
`mcp.NewClient` and `Client.Connect`, with `StreamableClientTransport`
or `SSEClientTransport` per server config.

- Auth and identity headers are injected through a custom
`http.RoundTripper` because the official SDK has no per-header transport
options.
- Tool input schemas are extracted from the SDK's `map[string]any`
decoding.
- Content conversion handles the official pointer content types; the SDK
decodes blob resources into raw bytes, so binary content is handled
without an extra base64 round trip.
- Test fixtures are official stateless Streamable HTTP servers.

> Mux created this PR on Mike's behalf.

2026-08-13 10:11:47 +00:00

..

agentselect

fix: use backend-selected chat agent for desktop, git, terminal (#26959)

2026-07-14 13:50:25 +01:00

chatadvisor

feat: redesign the advisor tool row (#28069)

2026-08-12 15:35:31 +01:00

chatdebug

chore: sync fantasy fork with upstream v0.40.0 and openai-go with v3.50.0 (#27981)

2026-08-11 11:20:05 +02:00

chaterror

fix(coderd/x/chatd): classify bedrock credential errors as non-retryable (#27913)

2026-08-06 15:51:32 +01:00

chathooks

feat: add --chat-hook-allow-insecure to allow plain HTTP chat hook URLs (#27896)

2026-08-05 22:41:17 +02:00

chatloop

feat: harden chat generation runtime instrumentation for billing (#27451)

2026-08-06 16:09:38 +07:00

chatopenai

refactor(coderd/x/chatd): read the OpenAI transport from the model (#27704)

2026-08-04 08:00:19 +00:00

chatprompt

fix: keep chat attachments while a linking chat exists

2026-08-11 13:53:15 +02:00

chatprovider

refactor(coderd/x/chatd): own provider option construction in one function (#27705)

2026-08-04 08:13:00 +00:00

chatretry

fix: enable goleak in chatd tests (#26335)

2026-06-16 12:35:40 +00:00

chatsanitize

fix: enable goleak in chatd tests (#26335)

2026-06-16 12:35:40 +00:00

chatstate

fix: allow manual chat compaction from the error state (#28022)

2026-08-12 20:38:57 +02:00

chattest

fix: report per-request Anthropic usage in chat token accounting (#27966)

2026-08-12 12:52:22 +02:00

chattool

chore(coderd/x/chatd): bump computer-use models to current frontier releases (#28026)

2026-08-11 20:49:49 +05:00

chatutil

refactor(coderd/x/chatd): remove dead model-routing dispatch shim (#26942)

2026-07-02 11:22:56 +01:00

mcpclient

feat(coderd/x/chatd/mcpclient): migrate external MCP client to official Go SDK (#28058)

2026-08-13 10:11:47 +00:00

messagepartbuffer

feat: harden chat generation runtime instrumentation for billing (#27451)

2026-08-06 16:09:38 +07:00

toolschema

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

active_turn_debug_internal_test.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

active_turn_debug.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

advisor_internal_test.go

refactor(coderd/x/chatd): carry the resolved OpenAI transport on a model wrapper (#27703)

2026-08-04 07:46:32 +00:00

ARCHITECTURE.md

fix: allow manual chat compaction from the error state (#28022)

2026-08-12 20:38:57 +02:00

attachments_internal_test.go

…

attachments.go

…

attempt.go

feat: harden chat generation runtime instrumentation for billing (#27451)

2026-08-06 16:09:38 +07:00

auto_archive_internal_test.go

chore(coderd/x/chatd): address generation review items (#26517)

2026-07-06 16:37:45 +00:00

auto_archive.go

chore(coderd/x/chatd): address generation review items (#26517)

2026-07-06 16:37:45 +00:00

chatd_debug.go

refactor(coderd/x/chatd): carry the resolved OpenAI transport on a model wrapper (#27703)

2026-08-04 07:46:32 +00:00

chatd_helpers_test.go

feat: add synthetic gateway keys (#27170)

2026-07-18 20:45:13 +02:00

chatd_internal_test.go

refactor(coderd/x/chatd): carry the resolved OpenAI transport on a model wrapper (#27703)

2026-08-04 07:46:32 +00:00

chatd_retry_test.go

feat: remove chat chain mode (#26980)

2026-07-06 11:57:12 +01:00

chatd_test.go

fix: allow manual chat compaction from the error state (#28022)

2026-08-12 20:38:57 +02:00

chatd.go

fix: allow manual chat compaction from the error state (#28022)

2026-08-12 20:38:57 +02:00

chatfile_internal_test.go

…

chatstate_bridge.go

refactor(coderd): stop storing chat gateway key IDs and drop the columns (#27171)

2026-07-20 19:49:19 +02:00

compaction_hooks_test.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

compaction_override_internal_test.go

refactor(coderd/x/chatd): read the OpenAI transport from the model (#27704)

2026-08-04 08:00:19 +00:00

compaction_override.go

refactor(coderd/x/chatd): own provider option construction in one function (#27705)

2026-08-04 08:13:00 +00:00

compaction_sanitize_internal_test.go

refactor(coderd/x/chatd): read the OpenAI transport from the model (#27704)

2026-08-04 08:00:19 +00:00

compaction_sanitize.go

refactor(coderd/x/chatd): read the OpenAI transport from the model (#27704)

2026-08-04 08:00:19 +00:00

computer_use.go

refactor(coderd/x/chatd): carry the resolved OpenAI transport on a model wrapper (#27703)

2026-08-04 07:46:32 +00:00

configcache_internal_test.go

fix(coderd): invalidate chatd provider cache on AI provider changes (#26987)

2026-07-07 00:20:54 +10:00

configcache.go

…

context_hydration_internal_test.go

feat: add workspace skills to agent chat slash menu (#25600)

2026-07-18 21:52:02 +02:00

context_hydration.go

feat: add workspace skills to agent chat slash menu (#25600)

2026-07-18 21:52:02 +02:00

context_integration_test.go

test: migrate chatd tests to AI Gateway routing (#26658)

2026-06-30 12:17:42 +01:00

context_prompt_internal_test.go

feat: add workspace skills to agent chat slash menu (#25600)

2026-07-18 21:52:02 +02:00

context_prompt.go

feat: remove chat chain mode (#26980)

2026-07-06 11:57:12 +01:00

context_rebind_internal_test.go

feat: add workspace skills to agent chat slash menu (#25600)

2026-07-18 21:52:02 +02:00

create_hooks_test.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

dialvalidation_internal_test.go

fix(coderd/x/chatd): stabilize dial timeout recovery test (#26153)

2026-06-11 16:08:32 +10:00

dialvalidation.go

fix(coderd/x/chatd): stabilize dial timeout recovery test (#26153)

2026-06-11 16:08:32 +10:00

docs.go

…

dynamictool_internal_test.go

…

dynamictool.go

…

forced_mcp_test.go

fix(coderd): enforce Force On MCP server policy on the backend (#27990)

2026-08-11 12:02:21 +02:00

generation_internal_test.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

generation_preparer_internal_test.go

chore: add test coverage for chatd compaction (#28053)

2026-08-13 08:42:23 +01:00

generation_preparer.go

feat: add built-in Browser tab for agent-browser (#27910)

2026-08-11 12:49:12 +02:00

generation_retry_internal_test.go

fix(coderd/x/chatd): log retry errors and add a task timeout (#26412)

2026-06-17 10:20:47 +00:00

generation.go

feat: harden chat generation runtime instrumentation for billing (#27451)

2026-08-06 16:09:38 +07:00

helpers_test.go

refactor(coderd): stop storing chat gateway key IDs and drop the columns (#27171)

2026-07-20 19:49:19 +02:00

hook_server.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

hooks_internal_test.go

feat: add --chat-hook-allow-insecure to allow plain HTTP chat hook URLs (#27896)

2026-08-05 22:41:17 +02:00

hooks_test.go

fix: keep chat attachments while a linking chat exists

2026-08-11 13:53:15 +02:00

instruction_internal_test.go

feat: improve sub-agent orchestration tools (#26673)

2026-06-26 13:41:43 +03:00

instruction.go

refactor: remove legacy live-read and injected-history chat context paths (#26585)

2026-06-22 19:26:34 -06:00

integration_responses_test.go

feat: add synthetic gateway keys (#27170)

2026-07-18 20:45:13 +02:00

integration_test.go

feat: remove unused chat statuses pending, paused, and completed (#27064)

2026-07-13 20:28:28 +02:00

main_test.go

fix: enable goleak in chatd tests (#26335)

2026-06-16 12:35:40 +00:00

mcp_refresh_internal_test.go

feat: revoke MCP server OAuth grants at the provider on disconnect (#27300)

2026-07-20 00:14:03 +02:00

message_conversion_test.go

feat: harden chat generation runtime instrumentation for billing (#27451)

2026-08-06 16:09:38 +07:00

message_conversion.go

feat: harden chat generation runtime instrumentation for billing (#27451)

2026-08-06 16:09:38 +07:00

model_routing_aibridge.go

refactor(coderd/x/chatd): read the OpenAI transport from the model (#27704)

2026-08-04 08:00:19 +00:00

model_routing_internal_test.go

fix(coderd/x/chatd): synchronize aibridgeTestFactory recorded fields (#28031)

2026-08-11 23:51:00 +02:00

model_routing.go

refactor(coderd/x/chatd): read the OpenAI transport from the model (#27704)

2026-08-04 08:00:19 +00:00

options.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

personal_model_override_test.go

feat: add configurable reasoning effort to Coder agents (#26974)

2026-07-09 23:35:12 +01:00

personal_model_override.go

feat: add configurable reasoning effort to Coder agents (#26974)

2026-07-09 23:35:12 +01:00

post_tool_use_test.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

pre_tool_use_test.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

prompt.go

feat: improve sub-agent orchestration tools (#26673)

2026-06-26 13:41:43 +03:00

provider_switch_sanitize_internal_test.go

fix(coderd/x/chatd): drop foreign provider-executed tools on model switch (#26555)

2026-06-29 11:49:10 +01:00

provider_switch_sanitize.go

fix(coderd/x/chatd): drop foreign provider-executed tools on model switch (#26555)

2026-06-29 11:49:10 +01:00

quickgen_internal_test.go

refactor(coderd/x/chatd): carry the resolved OpenAI transport on a model wrapper (#27703)

2026-08-04 07:46:32 +00:00

quickgen.go

refactor(coderd/x/chatd): own provider option construction in one function (#27705)

2026-08-04 08:13:00 +00:00

recording_internal_test.go

feat: remove unused chat statuses pending, paused, and completed (#27064)

2026-07-13 20:28:28 +02:00

recording.go

…

runner_manager.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

runner_test.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

runner.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

sanitize_test.go

…

sanitize.go

…

stop_test.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

store_chat_attachment_internal_test.go

fix: keep chat attachments while a linking chat exists

2026-08-11 13:53:15 +02:00

store_chat_attachment.go

fix: keep chat attachments while a linking chat exists

2026-08-11 13:53:15 +02:00

stream_loop_internal_test.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

stream_loop.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

stream_parts_dialer.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

stream_parts_internal_test.go

fix: enable goleak in chatd tests (#26335)

2026-06-16 12:35:40 +00:00

stream_parts_transport.go

fix(coderd/x/chatd): deflake TestStreamPartsDialerDialsPartsEndpoint (#26504)

2026-06-18 08:28:17 +00:00

stream_parts.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

stream_relay_internal_test.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

stream_relay.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

stream_subscribe.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

stream_sync_poller.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

stream_types.go

fix: chatd refactor (#26270)

2026-06-12 13:33:12 +02:00

subagent_catalog.go

feat: allow spawn_agent model and reasoning effort override (#27385)

2026-07-22 18:43:22 +02:00

subagent_context_internal_test.go

feat: add synthetic gateway keys (#27170)

2026-07-18 20:45:13 +02:00

subagent_internal_test.go

feat: add --chat-hook-allow-insecure to allow plain HTTP chat hook URLs (#27896)

2026-08-05 22:41:17 +02:00

subagent_test.go

feat: add synthetic gateway keys (#27170)

2026-07-18 20:45:13 +02:00

subagent.go

feat: remove native chat usage limits in favor of AI Gateway budgets (#27329)

2026-08-04 11:36:49 +02:00

summarygen_internal_test.go

feat: add chat summary tab in the right sidebar and per-chat cost endpoint (#26649)

2026-07-27 10:05:05 +01:00

synthetickey_internal_test.go

refactor(coderd): stop storing chat gateway key IDs and drop the columns (#27171)

2026-07-20 19:49:19 +02:00

synthetickey.go

feat: add synthetic gateway keys (#27170)

2026-07-18 20:45:13 +02:00

tasks_test.go

fix(coderd/x/chatd): deflake TestRunner_StartsRealInterruptTask (#28024)

2026-08-11 12:56:06 +00:00

tasks.go

feat: harden chat generation runtime instrumentation for billing (#27451)

2026-08-06 16:09:38 +07:00

testhooks.go

fix(coderd/x/chatd): resolve inflight race (#26460)

2026-06-17 18:29:43 +02:00

title_override_internal_test.go

refactor(coderd/x/chatd): carry the resolved OpenAI transport on a model wrapper (#27703)

2026-08-04 07:46:32 +00:00

title_override.go

refactor(coderd/x/chatd): carry the resolved OpenAI transport on a model wrapper (#27703)

2026-08-04 07:46:32 +00:00

toolinput_internal_test.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

toolinput.go

feat: wire chat lifecycle hooks into chatd (#27429)

2026-07-29 11:39:12 +00:00

turn_summary_internal_test.go

feat: add chat summary tab in the right sidebar and per-chat cost endpoint (#26649)

2026-07-27 10:05:05 +01:00

worker_internal_test.go

chore(coderd/x/chatd): address generation review items (#26517)

2026-07-06 16:37:45 +00:00

worker.go

chore(coderd/x/chatd): address generation review items (#26517)

2026-07-06 16:37:45 +00:00