[DEVIN: Konsti] Fix failing E2E tests: CLI error string and MCP prompt name

[devin-ai-integration]

Fixes three deterministic E2E test failures on the dev branch:

1. CLI test (apps/e2e/tests/general/cli.test.ts:611): The test expected 'File not found' but the actual CliError message is 'Config file not found: ...'. Updated to match the real error message from packages/stack-cli/src/lib/config-file-path.ts.

2. MCP prompt test (apps/e2e/tests/backend/endpoints/api/v1/internal/mcp.test.ts:114): The prompts/list test expected prompt name 'ask_stack_auth' but the MCP handler registers the prompt as 'skill' (apps/mcp/src/mcp-handler.ts:93-94). Updated to match.

3. MCP resource test (mcp.test.ts:131-132): The resources/list test expected resource name 'stack-auth-mcp-setup' with URI 'stack-auth://mcp/setup', but the handler now registers the resource as 'skill' with URI 'https://skill.stack-auth.com' (apps/mcp/src/mcp-handler.ts:76-78). Updated to match.

These failures were consistent across all E2E test workflows (regular, local emulator, custom port prefix). Other CI failures in the setup-tests and DB-migration-compat workflows appear to be flaky/timeout-related and also occur on the base branch.

Link to Devin session: https://app.devin.ai/sessions/5ee786b351194d4fb24b150fd358d6f5
Requested by: @N2D4

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Project	Deployment	Actions	Updated (UTC)
stack-auth-hosted-components	Ready	Preview, Comment	May 19, 2026 7:37pm
stack-auth-mcp	Ready	Preview, Comment	May 19, 2026 7:37pm
stack-auth-skills	Ready	Preview, Comment	May 19, 2026 7:37pm
stack-backend	Error		May 19, 2026 7:37pm
stack-dashboard	Ready	Preview, Comment	May 19, 2026 7:37pm
stack-demo	Ready	Preview, Comment	May 19, 2026 7:37pm
stack-docs	Ready	Preview, Comment	May 19, 2026 7:37pm
stack-preview-backend	Ready	Preview, Comment	May 19, 2026 7:37pm
stack-preview-dashboard	Ready	Preview, Comment	May 19, 2026 7:37pm

[greptile-apps]

Greptile Summary

This PR fixes two E2E test assertions that were mismatched against their implementations. Both corrections are verified against the source code they test.

• CLI test (cli.test.ts:611): Fixes the expected error substring from "File not found" to "Config file not found", which matches the CliError message in packages/stack-cli/src/lib/config-file-path.ts line 14.
• MCP test (mcp.test.ts:114): Fixes the expected prompt name from "ask_stack_auth" (the MCP tool name) to "skill" (the actual prompt registered in apps/mcp/src/mcp-handler.ts line 93–94).

Confidence Score: 5/5

Both test fixes are straightforward assertion corrections verified against the actual implementation — safe to merge.

Each changed assertion was confirmed against the source it tests: the CLI error string matches the exact CliError message in config-file-path.ts, and 'skill' matches the prompt name registered in mcp-handler.ts. No logic, no runtime paths, and no application code are modified.

No files require special attention.

Important Files Changed

Filename	Overview
apps/e2e/tests/general/cli.test.ts	Updated error string assertion from "File not found" to "Config file not found" to match the actual CliError message thrown in config-file-path.ts
apps/e2e/tests/backend/endpoints/api/v1/internal/mcp.test.ts	Updated prompt name assertion from "ask_stack_auth" (the tool name) to "skill" (the actual registered prompt name in mcp-handler.ts)

Sequence Diagram

sequenceDiagram
    participant Test as E2E Test
    participant CLI as stack-cli (init --mode link-config)
    participant CFP as config-file-path.ts
    participant MCP as mcp-handler.ts

    Note over Test,CFP: CLI test fix
    Test->>CLI: run with --config-file /nonexistent/stack.config.ts
    CLI->>CFP: "resolveConfigFilePathOption(path, {mustExist: true})"
    CFP-->>CLI: throw CliError("Config file not found: ...")
    CLI-->>Test: stderr contains "Config file not found" ✓

    Note over Test,MCP: MCP test fix
    Test->>MCP: prompts/list request
    MCP-->>Test: "[{name: "skill"}]"
    Test->>Test: "assert name === "skill" ✓"

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_{Reviews (1): Last reviewed commit: "Fix failing E2E tests: update CLI error ..." | Re-trigger Greptile}

[devin-ai-integration]

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