Astro: frontmatter fails at line 1 (partial extraction), and the warning hardcodes closed Kotlin issue #2551 for every language

[sortakool]

Summary

Two related problems, observed on 0.9.44.

1. The Astro extractor fails at line 1 on an ordinary --- frontmatter
   block, so the file is only partially extracted.
2. The warning that reports it hardcodes (#2551) for every language, and
   Kotlin: bundled grammar rejects one-line type bodies (class C { val v = 1 }) — 21/541 files partially extracted, exit 0, no warning #2551 is a closed, Kotlin-specific issue. Anyone who follows the pointer
   lands on a resolved problem that has nothing to do with their file.

1. Astro frontmatter fails at line 1

warning: 1 file(s) had syntax errors and may be partially extracted:
  website/src/pages/index.astro (first error at line 1) (#2551)

The file opens with the standard Astro component-script fence:

---
const GITHUB_URL = "https://github.com/adihebbalae/Attacca";
const BRANCH = "master";

const plugins = [
  { name: "attacca-core", tagline: "Workflow skills" },
  ...
];
---

Line 1 is the opening ---, which is the most basic construct the format has,
so this does not look like an edge case in the grammar.

Source: Attacca at website/src/pages/index.astro.

2. The warning misdirects every reader

extract.py:5636 (0.9.44):

f"may be partially extracted: {_shown}{_more} (#2551)",

(#2551) is a literal in the shared message, emitted regardless of language.
The surrounding comments already know this — line 5619 refers to "the genuine
#2551 Kotlin one-line-body" case — but the reference is still attached to all
of them.

The cost is concrete: the citation is the only lead the message offers, and it
sends the reader to a closed Kotlin issue. We initially recorded this astro
failure as "already tracked upstream" on the strength of that number, and only
found otherwise by opening it.

Suggestion: drop the hardcoded number, or make it language-aware, or point at a
stable docs page about partial extraction instead of a single issue.

Why partial extraction deserves a loud signal

"May be partially extracted" means an unknown number of nodes are missing from
the graph, and the run still exits 0. For a knowledge graph that is silent data
loss, and a consumer cannot tell a sparse file from a truncated one. A count of
what was dropped, even approximate, would make it actionable.