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fix: add missing id/sessionID/messageID to MCP tool attachments by NatChung · Pull Request #14345 · anomalyco/opencode

@ariontechs @claude 

MCP tool results (e.g. Playwright screenshots) return attachments
without id, sessionID, and messageID fields. This causes downstream
Zod validation to fail because MessageV2.FilePart requires these
fields.

Built-in tools already map attachments to include these fields
(line 808-814), but the MCP tool path (line 874) explicitly omits
them. This patch applies the same mapping to MCP tool attachments,
making both paths consistent.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

@NatChung NatChung deleted the fix/mcp-tool-attachment-ids branch

February 20, 2026 00:44

lacymorrow added a commit to lacymorrow/lash that referenced this pull request

Feb 22, 2026 
* upstream/dev: (476 commits)
  release: v1.2.9
  fix: issue from structuredClone addition by using unwrap (anomalyco#14359)
  tweak(ui): adjust session feed spacing
  tweak(ui): tone down reasoning emphasis
  tweak(ui): refine session feed spacing
  fix(desktop): restore settings header mask
  tweak(ui): nudge edited files chevron
  tweak(ui): stabilize collapsible chevron hover
  fix: add missing id/sessionID/messageID to MCP tool attachments (anomalyco#14345)
  Use structuredClone instead of remeda's clone (anomalyco#14351)
  remove unnecessary deep clones from session loop and LLM stream (anomalyco#14354)
  fix(web): correct config import path in Korean enterprise docs
  docs: update providers layout and Windows sidebar label
  core: remove User-Agent header assertion from LLM test to fix failing test
  release: v1.2.8
  fix(app): black screen on launch with sidecar server
  chore: generate
  feat(opencode): support adaptive thinking for claude sonnet 4.6 (anomalyco#14283)
  feat(tui): add custom tool and mcp call responses visible and collapsable (anomalyco#10649)
  chore: cleanup
  ...

# Conflicts:
#	bun.lock
#	packages/app/package.json
#	packages/console/app/package.json
#	packages/console/core/package.json
#	packages/console/function/package.json
#	packages/console/mail/package.json
#	packages/desktop/package.json
#	packages/enterprise/package.json
#	packages/extensions/zed/extension.toml
#	packages/function/package.json
#	packages/opencode/package.json
#	packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx
#	packages/opencode/src/cli/cmd/tui/routes/home.tsx
#	packages/opencode/src/config/config.ts
#	packages/opencode/src/tool/lsp.ts
#	packages/opencode/src/tool/read.ts
#	packages/plugin/package.json
#	packages/sdk/js/package.json
#	packages/slack/package.json
#	packages/ui/package.json
#	packages/util/package.json
#	packages/web/package.json
#	sdks/vscode/package.json

jonathanmiddleton pushed a commit to jonathanmiddleton/opencode that referenced this pull request

Mar 10, 2026