## Stack Context
PR 5 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 aibridge injected-MCP proxy now owns an official `*mcp.Client`,
`*mcp.StreamableClientTransport`, and `*mcp.ClientSession`.
- The proxy constructor accepts an optional `*http.Client` instead of
mark3labs options; the header-injecting wrapper shallow-copies a
supplied client so its Timeout, Jar, and redirect policy survive.
- Manual protocol version negotiation and the mark3labs five-second
close workaround are removed; the SDK negotiates during `Connect` and
fails when no mutually supported version exists.
- Repeated `Init` closes the previous session, and a failed tool fetch
closes the just-created session so transports do not leak.
- Tool and intercept types use the official pointer content types;
embedded resource blobs are re-encoded to base64 for model-facing text
because the SDK decodes them into raw bytes.
- `aibridge/mcpmock` is regenerated, and its stale `go:generate` source
path is corrected.
> Mux created this PR on Mike's behalf.
This PR merges code from `coder/aibridge` repository into `coder/coder`.
It was split into 4 PRs for easier review but stacked PRs will need to
be merged into this PR so all checks pass.
* https://github.com/coder/coder/pull/24190 -> raw code copy (this PR,
before merging PRs on top of it, it was just 1 commit:
https://github.com/coder/coder/commit/70d33f33200c7e77df910957595715f81f9bec24)
* https://github.com/coder/coder/pull/24570 -> update imports in
`coder/coder` to use copied code
* https://github.com/coder/coder/pull/24586 -> linter fixes and CI
integration (also added README.md)
* https://github.com/coder/coder/pull/24571 -> added exclude to
scripts/check_emdash.sh check
Original PR message (before PR squash):
Moves coder/aibridge code into coder/coder repository.
Omitted files:
- `go.mod`, `go.sum`, `.gitignore`, `.github/workflows/ci.yml,`
`Makefile`, `LICENSE`, `README.md` (modified README.md is added later)
- `.github`, `example`, `buildinfo,` `scripts` directories
Simple verification script (will list omitted files)
```
tmp=$(mktemp -d)
echo "$tmp"
git clone --depth=1 https://github.com/coder/aibridge "$tmp/aibridge"
git clone --depth=1 --branch pb/aibridge-code-move https://github.com/coder/coder "$tmp/coder"
diff -rq --exclude=.git "$tmp/aibridge" "$tmp/coder/aibridge"
# rm -rf "$tmp"
```
Michael Suchacz