[deep-report] Resolve `tools.serena` schema/parser disagreement (schema says REMOVED, parser still accepts it)

[github-actions]

Problem

The schema and parser disagree on tools.serena:

Schema (pkg/parser/schemas/main_workflow_schema.json, properties.tools.properties.serena):

{
  "description": "REMOVED: Built-in support for Serena has been removed. Use the shared/mcp/serena.md workflow instead.",
  "deprecated": true,
  "x-removed": true,
  "x-removal-message": "tools.serena built-in support has been removed. Import shared/mcp/serena.md instead"
}

Parser (pkg/parser/mcp.go:186, 214, 425): still has explicit serena handling as a built-in MCP tool alongside github and playwright:

if toolName == "github" || toolName == "playwright" || toolName == "serena" {
    config, err := processBuiltinMCPTool(toolName, toolValue, serverFilter)
}

No compile-time error or warning is emitted when tools.serena: is used at the top level. The x-removed extension is non-standard JSON Schema and not enforced anywhere in the codebase.

Impact

A user who reads the schema (e.g. via IDE schema integration) is told tools.serena is removed, but it silently works. Two truthful contracts disagree.

Fix

Pick one:

Option A — Honor the schema (recommended): Add a compile-time error in pkg/parser/mcp.go that rejects tools.serena with the x-removal-message, deleting the three serena code paths.

Option B — Honor the parser: Remove x-removed: true from the schema and downgrade the description to a deprecation notice (since the feature still works).

Evidence

Schema Consistency Audit 2026-05-17 (#32772).

Acceptance Criteria

• One option chosen and applied
• Compiler behavior matches schema declaration
• Existing workflows using tools.serena (if any) given a clear migration path
• Test coverage exists

Suggested Agent

Copilot — well-scoped consistency fix in parser + schema.

Estimated Effort

1–2h

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Source: DeepReport Intelligence Briefing 2026-05-17 — pulls from Schema Consistency Audit (#32772).

Generated by 🔬 DeepReport - Intelligence Gathering Agent · ● 24.9M · ◷

• expires on May 19, 2026, 7:40 PM UTC

[pelikhan]

@copilot tools.serena is REMOVED. Clean it out. It is now a shared agentic workflow instead