headroom/docs
Parideboy 6d5516dcb8
feat(code): add PHP support to CodeAwareCompressor (#2423)
## Description

Adds PHP to `CodeAwareCompressor`, fixing #201. PHP was already
*detected* as code (Magika labels in `headroom/compression/detector.py`
include `php`, and the Rust `magika_detector.rs` lists it too) but there
was no PHP `LangConfig`, so PHP content silently passed through
uncompressed. This wires PHP through the tree-sitter compression path
following the C# pattern (the most recently added, fully functional
language — deliberately not the quarantined Perl path).

A secondary detection bug is fixed along the way: PHP's `$variables`
match Perl's prefilter regex, and the existing Perl-dominance guard in
`detect_language` returned `UNKNOWN` for PHP files. An explicit `<?php`
open tag — which no Perl source contains — now drops Perl from the
candidate set before that guard runs.

## Type of Change

- [ ] Bug fix
- [x] New feature
- [ ] Documentation update
- [ ] Refactor
- [ ] Other

## Changes Made

- `headroom/transforms/code_compressor.py`: `CodeLanguage.PHP` +
`phtml`/`php5`/`php7`/`php8` aliases; PHP `LangConfig` built from the
actual tree-sitter-php grammar (node names verified by parsing samples):
`namespace_use_declaration` imports,
`function_definition`/`method_declaration` functions,
`class_declaration`/`interface_declaration`/`trait_declaration` classes,
`enum_declaration` types, `declaration_list` class bodies,
`compound_statement` function bodies. `namespace_definition` maps to
`package_node` so statement-scoped `namespace App;` hoists ahead of the
`use` imports (required PHP ordering); the rare block-scoped `namespace
A { }` form takes the same path and is preserved verbatim — valid
output, just no compression inside the block. PHP prefilter regexes
added; supported-languages error message updated; `<?php`-tag Perl
disambiguation in `detect_language`.
- `headroom/transforms/content_detector.py`: `php` entry in
`_CODE_PATTERNS` so raw PHP classifies as `SOURCE_CODE` and reaches the
code-aware route.
- `tests/test_transforms/test_code_compressor.py`: new `TestPhpSupport`
mirroring `TestCSharpSupport` — signatures preserved / bodies elided,
`<?php` → `namespace` → `use` → declarations ordering, auto-detection
despite the Perl sigil overlap, alias coercion, malformed passthrough.
- `tests/test_code_compressor_language_alias.py`: `php` in the canonical
list, `phtml` in the alias table.
- `docs/content/docs/code-compression.mdx`: PHP added to the Tier 2
supported-languages row.

No new dependency: `tree-sitter-language-pack` (the existing `[code]`
extra) already ships the PHP grammar. No Rust changes needed.

## Testing

- [x] New unit tests added and passing
- [x] Full affected test suites pass locally

**Test Output**

```
$ python -m pytest tests/test_transforms/test_code_compressor.py tests/test_code_compressor_language_alias.py -q
============================= 120 passed in 7.81s =============================

$ python -m pytest tests/test_transforms/ -q
3 failed, 443 passed   # the 3 failures (kompress ONNX thread caps, kompress size gate,
                       # text_crusher unicode parity) reproduce identically on a clean
                       # upstream/main checkout in this environment — pre-existing local
                       # ONNX runtime quirks, unrelated to this change

$ ruff check . (0.15.17, CI-pinned) → All checks passed!  |  ruff format --check → clean
$ mypy headroom/transforms/code_compressor.py headroom/transforms/content_detector.py --ignore-missing-imports
Success: no issues found in 2 source files
```

## Real Behavior Proof

- Environment: Windows 11, Python 3.13, tree-sitter +
tree-sitter-language-pack (<1.0) installed, branch
`feat/201-php-code-compression` off `upstream/main`.
- Exact command / steps: parsed PHP samples (namespaced class w/
methods, block-scoped namespace, mixed HTML+PHP) with
`tree_sitter_language_pack.get_parser('php')` to verify every node name
used in the config; then ran `CodeAwareCompressor().compress(php_code,
language="php")` and `compress(php_code)` (auto-detection) on a 48-line
realistic service class.
- Observed result: explicit and auto-detected paths both return
`language=CodeLanguage.PHP`, `compression_ratio=0.64`,
`syntax_valid=True`; method bodies elided to `// [N lines omitted]`
while `<?php`, `namespace`, `use` lines, class header, and all
signatures are preserved verbatim in the original order. Before the
detection fix, auto-detection returned `UNKNOWN` (Perl prefilter
dominance) — reproduced and then verified fixed.
- Not tested: exotic PHP shapes (heredoc-heavy code, attributes `#[...]`
on methods, interleaved multi-`<?php ?>` HTML templates beyond the basic
mixed case); these fall back to verbatim preservation via the
uncaptured-node pass or malformed-passthrough, both of which are covered
by tests for the simple cases.

## Review Readiness

- [x] I have performed a self-review
- [x] This PR is ready for human review

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: JerrettDavis <mxjerrett@gmail.com>
2026-07-31 15:54:13 -07:00
..
app docs: improve discoverability for AI agents and search crawlers 2026-05-13 17:36:06 -07:00
components docs: sync Vercel docs with current code and add in-depth proxy config (#2475) 2026-07-21 16:26:56 -07:00
content/docs feat(code): add PHP support to CodeAwareCompressor (#2423) 2026-07-31 15:54:13 -07:00
lib docs: sync Vercel docs with current code and add in-depth proxy config (#2475) 2026-07-21 16:26:56 -07:00
overrides fix: repair release and docs pipelines 2026-04-16 12:53:51 -05:00
screenshots Merge pull request #147 from JerrettDavis/feat/anthropic-usage-insights 2026-04-12 10:54:22 -07:00
.gitignore new docs UI + ts doc coverage 2026-04-12 13:15:58 +06:00
bun.lock fix(deps): remediate dependency CVEs and publish SBOM (#1509) 2026-06-27 15:28:12 -07:00
claude-code-bedrock-headroom.md fix(bedrock): route ARNs via converse, named AWS profiles, and au. re… (#1456) 2026-07-02 22:51:05 -05:00
next.config.mjs new docs UI + ts doc coverage 2026-04-12 13:15:58 +06:00
observability.md fix: remove rtk and lean-ctx CLI context tools (#2677) 2026-07-30 22:59:41 -07:00
package-lock.json deps: bump the npm-minor-patch group across 3 directories with 7 updates (#2276) 2026-07-21 11:21:14 -05:00
package.json deps: bump the npm-minor-patch group across 3 directories with 7 updates (#2276) 2026-07-21 11:21:14 -05:00
platform-feature-matrix.json fix: harden persistent install startup (#1851) 2026-07-10 00:40:34 -04:00
platform-stabilization.md fix: harden persistent install startup (#1851) 2026-07-10 00:40:34 -04:00
postcss.config.mjs new docs UI + ts doc coverage 2026-04-12 13:15:58 +06:00
proxy.ts new docs UI + ts doc coverage 2026-04-12 13:15:58 +06:00
README.md new docs UI + ts doc coverage 2026-04-12 13:15:58 +06:00
source.config.ts docs(ci): add CI/CD flow diagrams (#1062) 2026-06-16 23:05:15 -07:00
tsconfig.json new docs UI + ts doc coverage 2026-04-12 13:15:58 +06:00
vercel.json fix: add Vercel deploy config and workflow for docs site (#1739) 2026-07-14 13:25:18 -04:00

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