gstack-gbrain-sync.ts auto-generates invalid source IDs from github remote URLs (>32 chars, contains dots)

[WilliamCourterWelch]

The orchestrator at bin/gstack-gbrain-sync.ts auto-generates a source ID from the git remote URL, producing IDs like:

gstack-code-github.com-someuser-some-repo-name

This is 56+ chars and contains dots (.), which exceeds gbrain's source-ID constraint (1-32 lowercase alnum + interior hyphens only).

Reproduction

1. gh repo create user/some-repo --private && cd some-repo
2. bun run ~/.claude/skills/gstack/bin/gstack-gbrain-sync.ts --full

Observed

ERR   code   source registration failed: gbrain sources add gstack-code-github.com-... failed:
       Invalid source id "gstack-code-github.com-...". Must be 1-32 lowercase alnum chars
       with optional interior hyphens (e.g. "wiki", "yc-media").

The code stage of /sync-gbrain --full fails with that error. memory and brain-sync stages still succeed, but the repo's code is never indexed for gbrain search / gbrain code-def.

Expected

Source ID derived from REPO NAME ONLY (e.g., gstack-code-some-repo), not the full remote URL with github.com prefix and user/org segment.

Suggested fix

Strip github.com/ prefix, drop the user/org segment, slugify the remaining repo name, truncate to <=32 chars. The constraint regex [a-z0-9-]{1,32} already exists in gbrain — gstack just needs to respect it.

Workaround

Manually register the source first with a valid short ID:

gbrain sources add gstack-code-<short-name> --path "$(pwd)"

Then /sync-gbrain can proceed. But auto-generation should produce valid IDs without manual intervention.

[abhi5515521c]

import { execSync } from "child_process";

function getRepoName(): string {
const remoteUrl = execSync("git config --get remote.origin.url")
.toString()
.trim();

// Handles both SSH and HTTPS
// Examples:
// git@github.com:user/repo.git
// https://github.com/user/repo.git

let repo = remoteUrl
.replace(/.git$/, "") // remove .git
.split(/[:/]/) // split on : or /
.pop(); // get last segment

return repo || "repo";
}

function slugify(input: string): string {
return input
.toLowerCase()
.replace(/[^a-z0-9]+/g, "-") // replace invalid chars with -
.replace(/^-+|-+$/g, "") // trim leading/trailing -
.replace(/-{2,}/g, "-"); // collapse multiple -
}

function buildSourceId(): string {
const repo = getRepoName();
const slug = slugify(repo);

const prefix = "gstack-code-";
const maxLen = 32;

const remaining = maxLen - prefix.length;

const trimmedSlug = slug.slice(0, remaining);

return ${prefix}${trimmedSlug};
}