fix(cli): parse GitHub URLs with slash-based branches and multi-dot spec files

[q404365631]

What

Fixes two validation bugs in the CLI described in #1940:

1. GitHub URL parsing (validation.service.ts)

The regex used to convert https://github.com/owner/repo/blob/<branch>/<path> to the GitHub API URL only accepted a single-segment branch, so URLs like

https://github.com/org/repo/blob/feature/new-validation/spec.yaml

were not matched and the API call 404'd. The fix captures everything after /blob/, then heuristically splits off the trailing /<file>.{yaml,yml,json} portion as the file path (with everything before it as the branch). If the trailing portion doesn't have a known spec extension, it falls back to taking the first /-delimited segment as the branch.

2. File extension detection (SpecificationFile.ts)

fileExists() used name.split('.')[1] to extract the extension, which only returned the second segment. A file named spec.test.yaml returned "test" instead of "yaml" and was rejected. Switched to path.extname(name).slice(1).toLowerCase() which correctly returns the last extension.

Why

Both bugs cause valid inputs to fail validation, as reported in #1940.

Changes

• src/domains/services/validation.service.ts: Replaced the strict single-segment regex in convertGitHubWebUrl() with a more permissive pattern + split heuristic.
• src/domains/models/SpecificationFile.ts: Replaced name.split('.')[1] with path.extname(name).slice(1).toLowerCase() in fileExists(). path was already imported.

2 files changed, 45 insertions(+), 4 deletions(-).

Testing

Verified manually with the example URLs from the issue:

• https://github.com/org/repo/blob/feature/new-validation/spec.yaml → resolves to https://api.github.com/repos/org/repo/contents/spec.yaml?ref=feature/new-validation
• spec.test.yaml → extension correctly detected as yaml

No new automated tests added in this PR to keep it minimal — happy to follow up with a unit test file if the maintainers want.

Closes #1940

Part of MICROGRANT 2026-05 round (#2125).

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🦋 Changeset detected

Latest commit: d3a2c3a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@asyncapi/cli	Patch

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[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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