Replace `chardet` Python library immediately

Generative AI.

Replace with charset_normalizer.

2025-12-18 Remove Python 3.9 support, add Python 3.14 support (#311) 
2026-01-05 Ignore .claude 
2026-01-06 Add github codespace support (#312) 
2026-02-20 Pass max_bytes parameter to UniversalDetector in detect() and detect_all() (#314) 
2026-02-21 Create CLAUDE.md and update AGENTS.md 
2026-02-21 Fix SJISDistributionAnalysis discarding valid second-byte range >= 0x80 (#315) 
2026-02-21 Add test for distribution analysis get_order() coverage of valid characters 
2026-02-21 Pre-release fixes: bump to 6.0.0, fix get_charset crash, cleanup 
2026-02-21 Add --encoding-era CLI flag and improve heuristic selection 
2026-02-21 Add LEGACY_REGIONAL encoding era and reclassify misplaced encodings 
2026-02-21 Update documentation for 6.0.0 release 
2026-02-21 Fix pyright type errors in chardetect.py and test.py 
2026-02-21 Add .readthedocs.yaml to fix RTD builds 
2026-02-21 docs: update copyright to 2015-2026 chardet contributors 
2026-02-21 docs: fix copyright start year and remove first-person reference 
2026-02-21 docs: modernize usage examples and reorganize table of contents 
2026-02-22 Update version to 6.0.0.post1 
2026-02-22 Bump version to 6.0.1.dev0 for future dev 
2026-02-23 Potential fix for code scanning alert no. 2: Workflow does not contain permissions (#320) 
2026-02-23 Refactor create_language_model to cache unfiltered bigrams 
2026-02-23 Add Urdu and Cornish probers that were missing 
2026-02-23 Fix remove_xml_tags treating bare > as tag closer 
2026-02-24 Fix CP932 misclassified as single byte 
2026-02-24 Retrain with latest version of create_language_model 
2026-02-24 Update AGENTS.md now that training is cached 
2026-02-24 Add accuracy investigation design doc 
2026-02-24 Add accuracy investigation implementation plan 
2026-02-25 Fix 20 regressions in XML/markup file detection 
2026-02-25 Improve detection accuracy with non-ASCII bigram analysis 
2026-02-25 Add fallback encoding when no prober meets threshold 
2026-02-26 Remove binary file from ASCII test data 
2026-03-01 Wipe it clean 
2026-02-25 Add chardet rewrite design document 
2026-02-25 Add chardet rewrite implementation plan 
2026-02-25 chore: scaffold project with uv, ruff, pytest, pre-commit 
2026-02-25 feat: add EncodingEra IntFlag enum 
2026-02-25 feat: add encoding registry with era classifications 
2026-02-25 feat: add DetectionResult type for pipeline stages 
2026-02-25 feat: add Stage 0 binary content detection 
2026-02-25 feat: add Stage 1a BOM detection 
2026-02-25 feat: add Stage 1b ASCII detection 
2026-02-25 feat: add Stage 1c UTF-8 structural validation 
2026-02-25 feat: add Stage 1d markup charset extraction 
2026-02-25 feat: add Stage 2a byte validity filtering 
2026-02-25 feat: add Stage 2b multi-byte structural probing 
2026-02-25 feat: add bigram model format, loading, and training pipeline 
2026-02-25 feat: add Stage 3 statistical scoring with parallel support 
2026-02-25 feat: add pipeline orchestrator connecting all stages 
2026-02-25 feat: add detect() and detect_all() public API 
2026-02-25 feat: add UniversalDetector streaming API 
2026-02-25 feat: add chardetect CLI 
2026-02-25 feat: add accuracy test suite against chardet test data 
2026-02-25 feat: add benchmark suite and performance regression tests 
2026-02-25 fix: move BOM before binary detection, add UTF-16/32 null-byte detection 
2026-02-25 feat: add encoding equivalence classes to accuracy test 
2026-02-25 feat: add escape-sequence encoding detection for ISO-2022 and HZ-GB-2312 
2026-02-25 feat: improve accuracy with high-byte bigram weighting and equivalence classes 
2026-02-25 feat: retrain models with CulturaX data and 5000 samples per language 
2026-02-25 fix: restore missing encoding models and clean up training script 
2026-02-25 Retrain with max-samples set to 15000 
2026-02-25 Bump up minimum overall accuracy to 79% 
2026-02-25 Go nuts with ruff rules 
2026-02-25 docs: add accuracy improvements design and diagnostic scripts 
2026-02-25 docs: add accuracy improvements implementation plan 
2026-02-25 test: replace bidirectional equivalences with directional superset classes 
2026-02-25 feat: add windows-1252 fallback and binary confidence to pipeline 
2026-02-25 feat: gate CJK multi-byte candidates on structural evidence 
2026-02-25 perf: cache structural scores to avoid duplicate computation 
2026-02-25 feat: add era-based tiebreaking for close statistical scores 
2026-02-25 Revert "feat: add era-based tiebreaking for close statistical scores" 
2026-02-25 refactor: update diagnostic scripts to use directional equivalences 
2026-02-25 feat: add --encodings filter to train.py for targeted retraining 
2026-02-25 feat: retrain koi8-r/cp866 on Russian-only to improve Cyrillic discrimination 
2026-02-26 feat: retrain Western European models with expanded language coverage 
2026-02-26 refactor: extract shared equivalence logic into chardet.equivalences 
2026-02-26 refactor: improve train.py and add deserialize_models tests 
2026-02-26 docs: add design for test parallelism, perf, and accuracy improvements 
2026-02-26 docs: add implementation plan for test parallelism, perf, and accuracy 
2026-02-26 build: add pytest-xdist for parallel test execution 
2026-02-26 refactor: extract collect_test_files into shared scripts/utils.py 
2026-02-26 test: parametrize accuracy tests per-file for xdist parallelism 
2026-02-26 refactor: consolidate compare scripts into single compare_detectors.py 
2026-02-26 feat: add detection profiling script 
2026-02-26 perf: remove ProcessPoolExecutor from statistical scoring 
2026-02-26 perf: use flat bytearray lookup tables for bigram scoring 
2026-02-26 feat: add encoding equivalences for iso-8859-1, cp037/cp500, gb2312, and Central European encodings 
2026-02-26 feat: add Phase 2 encoding equivalences for Hebrew, Greek, Baltic, Cyrillic, and Western European 
2026-02-26 feat: unify Western European encodings into a single bidirectional equivalence group 
2026-02-26 style: fix ruff FURB110 lint warnings in scripts 
2026-02-26 fix: remove invalid encoding equivalences and add memory/startup benchmarking 
2026-02-26 Add initial performance report for rewrite 
2026-02-26 refactor: unify all detectors to subprocesses and extract benchmark script 
2026-02-26 docs: update performance report with all 7 detectors 
2026-02-26 feat: download test data from chardet/test-data and exclude from builds 
2026-02-26 docs: add design for accuracy improvements to 95% 
2026-02-26 fix: clone test data at collection time when missing 
2026-02-26 docs: add implementation plan for accuracy improvements to 95% 
2026-02-26 feat: add is_equivalent_detection() for base-letter equivalence checking 
2026-02-26 fix: use normalized encoding names in decode and add symbol diff test 
2026-02-26 feat: integrate is_equivalent_detection into test harness and diagnosis script 
2026-02-26 fix: tighten CJK multi-byte gating to reduce false positives 
2026-02-26 feat: add currency/euro symbol equivalence to decoded-output comparison 
2026-02-26 fix: demote iso-8859-10 when no distinguishing bytes present 
2026-02-26 fix: preserve confidence ordering in iso-8859-10 demotion 
2026-02-26 feat: add post-decode mess detection to penalize wrong encodings 
2026-02-26 fix: address mess detection review issues 
2026-02-26 feat: train per-language-encoding bigram models with language detection 
2026-02-26 fix: restore score_bigrams backward compat and add encoding index 
2026-02-26 perf: tune detection pipeline for 95% accuracy target 
2026-02-26 docs: update performance report with 95.4% accuracy 
2026-02-26 fix: address code review issues and remove mess detection 
2026-02-26 perf: optimize scoring loop, binary detection, and registry caching 
2026-02-26 fix: address code review feedback 
2026-02-27 docs: update performance report with 95.0% accuracy 
2026-02-27 docs: add mypyc optimization design plan 
2026-02-27 docs: add mypyc optimization implementation plan 
2026-02-27 refactor: prepare models module for mypyc compilation 
2026-02-27 refactor: prepare structural module for mypyc compilation 
2026-02-27 refactor: prepare validity module for mypyc compilation 
2026-02-27 refactor: prepare statistical module for mypyc compilation 
2026-02-27 build: add hatch-mypyc configuration for optional compilation 
2026-02-27 fix: resolve mypyc compilation type errors and add .so to gitignore 
2026-02-27 docs: update performance report with mypyc benchmark results 
2026-02-27 refactor: switch mypyc config from exclude to include list 
2026-02-27 refactor: split benchmark.py into benchmark_time.py and benchmark_memory.py 
2026-02-27 fix: apply decoded-output equivalence in compare_detectors.py and update performance report 
2026-02-27 docs: add accuracy improvements v2 design plan 
2026-02-27 docs: add accuracy improvements v2 implementation plan 
2026-02-27 feat: add stdout flushing to train.py for tee compatibility 
2026-02-27 feat: write training metadata YAML alongside models.bin 
2026-02-27 feat: bump max_samples default to 25000 for better model quality 
2026-02-27 feat: add KOI8-T promotion heuristic for Tajik text detection 
2026-02-27 feat: add lead byte diversity check to CJK false-positive gating 
2026-02-27 feat: retrain all 233 bigram models at 25K samples 
2026-02-27 Revert "feat: retrain all 233 bigram models at 25K samples" 
2026-02-27 revert: restore max_samples default to 15000 
2026-02-27 docs: add parallel training design and implementation plan 
2026-02-27 feat(train): add --build-workers CLI argument 
2026-02-27 refactor(train): extract _build_one_model function 
2026-02-27 feat(train): wire ProcessPoolExecutor into model build loop 
2026-02-27 fix(train): use _load_cached_articles in workers to prevent hanging processes 
2026-02-27 feat: retrain models with parallel training pipeline 
2026-02-27 docs: add CLAUDE.md with project overview and conventions 
2026-02-27 fix: suppress FA100 for mypyc-compiled modules and fix lint warnings 
2026-02-27 refactor: address code review findings 
2026-02-27 fix: match chardet 6.0.0 public API signatures for backward compatibility 
2026-02-27 feat: implement should_rename_legacy, ignore_threshold, and lang_filter DeprecationWarning 
2026-02-27 docs: update performance comparison with expanded ISO-to-Windows superset equivalences 
2026-02-27 fix: add DeprecationWarning for unused chunk_size param and suppress FBT lint 
2026-02-27 refactor: address code review findings across codebase 
2026-02-27 fix: harden model loading and validate max_bytes parameter 
2026-02-27 fix: address staff-level code review findings across codebase 
2026-02-28 docs: update performance benchmarks with verified measurements 
2026-02-28 feat: add --pure flag to benchmark scripts to detect stale mypyc .so files 
2026-02-28 docs: add confusion group resolution design for accuracy improvement 
2026-02-28 docs: add confusion group resolution implementation plan 
2026-02-28 feat: add confusion group computation for similar encodings 
2026-02-28 feat: add distinguishing byte maps with Unicode categories 
2026-02-28 feat: add binary serialization for confusion group data 
2026-02-28 feat: generate confusion.bin during model training 
2026-02-28 feat: add lazy loading of confusion.bin at runtime 
2026-02-28 feat: add Unicode category voting resolution strategy 
2026-02-28 feat: add distinguishing-bigram re-scoring resolution strategy 
2026-02-28 feat: integrate confusion group resolution into detection pipeline 
2026-02-28 feat: add env var override for confusion strategy experimentation 
2026-02-28 feat: regenerate models with full training data (15k samples) 
2026-02-28 fix: resolve lint issues in confusion module and tests 
2026-02-28 perf: add utf1632, utf8, and escape modules to mypyc compilation 
2026-02-28 style: apply pyupgrade --py310-plus modernizations 
2026-02-28 fix: replace dot product with cosine similarity in bigram scoring 
2026-02-28 fix: score all candidates in single pool to fix normalization bug 
2026-02-28 fix: use raw cosine scores as confidence instead of max-normalization 
2026-02-28 fix: use weighted category voting instead of binary votes 
2026-02-28 fix: run chardet-rewrite in isolated venv for fair comparison 
2026-02-28 refactor: replace --use-encoding-era bool flag with --encoding-era choice 
2026-02-28 docs: add language detection accuracy tracking design 
2026-02-28 docs: add language detection accuracy implementation plan 
2026-02-28 feat: add detected_language to benchmark_time.py JSON output 
2026-02-28 feat: track language detection accuracy in compare_detectors.py 
2026-02-28 feat: add language accuracy reporting to compare_detectors.py output 
2026-02-28 fix: use shared denominator in per-encoding language accuracy table 
2026-02-28 feat: add language mismatch warnings to test_accuracy.py 
2026-02-28 feat: infer language from single-language encodings 
2026-02-28 feat: normalize ISO 639-1 language codes in scripts and tests 
2026-02-28 docs: update performance comparison with latest benchmark results 
2026-02-28 docs: add language detection accuracy section to performance doc 
2026-02-28 docs: add design for statistical language inference in _fill_language 
2026-02-28 feat: use statistical bigram scoring for language on multi-language encodings 
2026-02-28 docs: add design for UTF-8 language models with universal fallback 
2026-02-28 docs: add implementation plan for UTF-8 language models 
2026-02-28 feat: train UTF-8 byte bigram models for all 48 languages 
2026-02-28 feat: add Tier 3 decode-to-UTF-8 language fallback in _fill_language 
2026-02-28 perf: cap language scoring data to 2KB and fix mypyc BigramProfile bug 
2026-02-28 docs: note previous mypyc numbers were from stale build 
2026-02-28 fix: add BigramProfile.from_weighted_freq() factory classmethod 
2026-02-28 fix: add len(data) to structural analysis cache key for safety 
2026-02-28 refactor: remove score_bigrams wrapper and dead models parameter 
2026-02-28 refactor: deduplicate _resolve_rename and _validate_max_bytes 
2026-02-28 refactor: move build-time confusion functions and script tests to scripts/ 
2026-02-28 refactor: minor cleanups from code review 
2026-02-28 build: switch from pre-commit to prek for git hooks 
2026-02-28 docs: add thread-safety design for PipelineContext + cache locking 
2026-02-28 feat: add PipelineContext dataclass for per-run pipeline state 
2026-02-28 refactor: thread PipelineContext through structural.py, remove module-level cache 
2026-02-28 refactor: create PipelineContext in orchestrator, thread through call chain 
2026-02-28 fix: add double-checked locking to model caches for thread safety 
2026-02-28 fix: add double-checked locking to confusion and registry caches 
2026-02-28 test: add thread-safety integration test for concurrent detect() 
2026-02-28 fix: remove inner re-check in mypyc-compiled cache locks 
2026-02-28 test: add cold-cache race, high-concurrency, and GIL diagnostic tests 
2026-02-28 ci: add GitHub Actions workflow with free-threaded Python testing 
2026-02-28 ci: add Python 3.14 and 3.14t to CI matrix 
2026-02-28 ci: add coverage configuration 
2026-02-28 ci: run tests under coverage and upload to Codecov 
2026-02-28 docs: add design for performance doc update with thread safety 
2026-02-28 docs: add implementation plan for performance doc update 
2026-02-28 docs: update performance doc with thread safety results 
2026-02-28 ci: add ty type checking to prek and xfail known accuracy gaps 
2026-02-28 fix: UTF-32 BOM alignment, UTF-8 binary false positives, and CJK gating 
2026-02-28 docs: add design for docstrings and type annotations 
2026-02-28 docs: add implementation plan for docstrings and type annotations 
2026-02-28 chore: enforce docstring and return-type ruff rules for src/chardet 
2026-02-28 docs: add Sphinx reST docstrings to all src/chardet/ modules 
2026-03-01 refactor: code review fixes — DRY constants, cleaner types, test hygiene 
2026-03-01 Update performance report 
2026-03-01 Remove unnecessary TYPE_CHECKING guards 
2026-03-01 Remove unused strategy param from resolve_confusion_groups 
2026-03-01 analyser -> analyzer 
2026-03-01 Commit thread safety implementation plan for posterity 
2026-03-01 Add documentation setup design doc 
2026-03-01 Add documentation setup implementation plan 
2026-03-01 Add docs dependency group (Sphinx, Furo, sphinx-copybutton) 
2026-03-01 Add Sphinx configuration and ReadTheDocs config 
2026-03-01 Add docs landing page (index.rst) 
2026-03-01 Add usage documentation page 
2026-03-01 Add supported encodings page (generated from registry) 
2026-03-01 Add 'How It Works' documentation page 
2026-03-01 Add performance benchmarks documentation page 
2026-03-01 Add FAQ documentation page 
2026-03-01 Add API reference page (autodoc from source docstrings) 
2026-03-01 Fix copyright year and clarify FAQ version narrative 
2026-03-01 Add documentation build commands to CLAUDE.md 
2026-03-01 Update copyright date to reflect rewrite 
2026-03-01 Unify UniversalDetector with detect()/detect_all() pipeline 
2026-03-01 Add release workflow for PyPI publishing on tag push 
2026-03-01 feat: add UTF-7 detection via escape sequence matching 
2026-03-01 fix: tighten UTF-7 validation to reject false positives 
2026-03-01 style: fix ruff lint violations in escape.py 
2026-03-01 feat: add cp273 (EBCDIC German) to registry and training config 
2026-03-01 feat: add hp-roman8 to registry and training config 
2026-03-01 fix: accept RFC 2152 implicit termination in UTF-7 detection 
2026-03-01 feat: train bigram models for cp273 and hp-roman8 
2026-03-01 test: add end-to-end detection tests for UTF-7, cp273, hp-roman8 
2026-03-01 docs: update supported encoding count to 84 
2026-03-01 docs: add design and implementation plan for cp273, hp-roman8, UTF-7 
2026-03-01 perf: skip irrelevant escape checks when only '+' is present 
2026-03-01 fix: reject UTF-7 detection when data contains bytes > 0x7F 
2026-03-01 docs: update README examples with accurate output comments 
2026-03-01 docs: add English ASCII and UTF-8 examples to README 
2026-03-01 feat: train English bigram models for improved language detection 
2026-03-01 docs: add design for language metadata in encoding registry 
2026-03-01 docs: add implementation plan for registry language metadata 
2026-03-01 feat: add languages field to EncodingInfo and utf-7 to registry 
2026-03-01 test: add tests for registry languages field and utf-7 entry 
2026-03-01 refactor: derive _SINGLE_LANG_MAP from registry instead of hardcoding 
2026-03-01 refactor: derive ENCODING_LANG_MAP from registry instead of hardcoding 
2026-03-01 refactor: standardize escape.py language strings to ISO 639-1 codes 
2026-03-01 test: use ISO 639-1 code in pipeline types test for consistency 
2026-03-01 docs: add design for full Python character encoding coverage 
2026-03-01 docs: add implementation plan for full Python encoding coverage 
2026-03-01 refactor: flip encoding supersets and add missing aliases in registry 
2026-03-01 refactor: update structural analyzer dispatch keys for renamed encodings 
2026-03-01 feat: resolve registry aliases in model index, remove gb2312 hack 
2026-03-01 feat: differentiate ISO-2022-JP branches in escape detector 
2026-03-01 feat: update equivalences for flipped supersets and ISO-2022-JP branches 
2026-03-01 fix: regenerate confusion.bin and update tests for renamed encodings 
2026-03-01 revert: remove cp037 from cp500 equivalences (out of scope) 
2026-03-01 fix: correct EBCDIC superset: cp1140 replaces cp037, not cp500 
2026-03-01 docs: correct EBCDIC section in design doc 
2026-03-01 refactor: convert REGISTRY from tuple to MappingProxyType dict 
2026-03-01 refactor: address code review findings across the codebase 
2026-03-01 docs: update benchmark numbers and revamp README comparison table 
2026-03-01 docs: update supported encoding count to 99 across all docs 
2026-03-01 fix: score_best_language early-exit bug and move training-only dict 
2026-03-01 docs: report speeds as files/second instead of total time 
2026-03-01 Update README some more 
2026-03-01 refactor: default encoding_era to ALL and simplify should_rename_legacy 
2026-03-01 Remove plans to keep PR less noisy 
2026-03-01 build: derive version from git tags via hatch-vcs 
2026-03-02 docs: update CLAUDE.md for hatch-vcs versioning and current architecture 
2026-03-02 docs: update docs for encoding_era=ALL default, fix stale numbers, add missing pipeline stages 
2026-03-02 docs: fix stale encoding_era example in README 
2026-03-02 ci: restrict GITHUB_TOKEN to read-only permissions 
2026-03-02 fix: address PR review findings across error handling, types, docs, and tests 
2026-03-02 docs: fix stale confidence, language count, and stage count in docs 
2026-03-02 fix: resolve all ruff and ty lint failures 
2026-03-02 chore: update devcontainer to install prek hooks and add Ruff extension 
2026-03-02 Add authors and maintainers back to pyproject.toml 
2026-03-02 fix: test harness None-None support, UTF-7 false positives, and WHATWG replacement era reclassification 
2026-03-02 fix: handle binary files systematically via collect_test_files() and equivalences 
2026-03-02 docs: update performance benchmarks for 2179 test files (incl. binary) 
2026-03-02 fix: CLI defaults to ALL encoding era, remove --legacy flag 
2026-03-02 docs: comprehensive documentation update 
2026-03-02 Slight tweak to index.rst 
2026-03-02 docs: hide inline toctree on landing page, keep sidebar nav 
2026-03-02 Tweak FAQs 
2026-03-02 Tweak README 
2026-03-02 Update tag trigger for PyPI releases 
2026-03-02 Make readthedocs get tags 
2026-03-02 Make index.rst example match one from README 
2026-03-02 docs: fix code examples and benchmark numbers to match actual output 
2026-03-02 tests: add streaming parity test for detect vs UniversalDetector (GH-296) 
2026-03-02 fix: use post_checkout to unshallow clone for ReadTheDocs builds 
2026-03-02 Add slug for codecov 
2026-03-02 Add codecov badge 
2026-03-02 docs: add keywords and changelog URL to project metadata 
2026-03-02 fix: update cibuildwheel action from v2 to v3 
2026-03-02 fix: use cibuildwheel@v3.3 (no rolling major version tag exists) 
2026-03-02 fix: install uv and pass mypyc env var into cibuildwheel builds 
2026-03-02 Add 7.0.0 release date to changelog 
2026-03-02 docs: clarify that mypyc wheels are prebuilt on PyPI 
2026-03-02 docs: add mypyc vs pure Python speed stats across all docs 
2026-03-02 docs: add cross-Python-version timing benchmarks (7.0.0rc4) 
2026-03-02 docs: add import timing to cross-version benchmark tables 
2026-03-02 docs: extend changelog to cover all PyPI releases (1.0-2.1.1) 
2026-03-02 docs: add test data coverage design plan 
2026-03-02 docs: add test data coverage implementation plan 
2026-03-03 Make tests/data get ignored if it is a symlink too 
2026-03-03 Allow symlink tests/data to simplify updating test-data repo 
2026-03-03 Remove known failure entries for deleted duplicate test files 
2026-03-03 Add known failure entries for new DOS codepage test files 
2026-03-03 docs: add test coverage gap analysis and improvement design 
2026-03-03 docs: add test coverage gap implementation plan 
2026-03-03 refactor: remove dead code branches and add pragma for invariant assertion 
2026-03-03 Add tests for uncovered branches across pipeline modules 
2026-03-03 Add CLI, confusion, models, and script utility tests 
2026-03-03 Reach 100% test coverage across all chardet modules 
2026-03-03 Update test infrastructure for ISO 639-1 language codes 
2026-03-03 Update language equivalences for mutual intelligibility 
2026-03-04 Update CLAUDE.md to stop a couple stupid things 
2026-03-04 Fix _SINGLE_LANG_MAP missing aliases 
2026-03-04 Retrain models and remove 24 resolved xfails 
2026-03-04 Fix false UTF-7 detection of SHA-1 git hashes (#324) 
2026-03-04 Add separate lint job back 
2026-03-04 Bump coverage requirements up to 95% since we have 100% 
2026-03-04 Fix precommit hook failures 
2026-03-04 Use package name in cache filenames and enrich display labels 
2026-03-04 Remove plans 
2026-03-04 feat: add helpers for venv-less version/tag resolution and cache checking 
2026-03-04 fix: use project_root parameter instead of pip_args[0] in _resolve_version_without_venv 
2026-03-04 feat: skip venv creation when full cache exists for detector 
2026-03-04 fix: remove unused cached_specs and add version mismatch diagnostic 
2026-03-04 docs: update benchmark numbers for expanded test suite (2,510 files) 
2026-03-06 Update changelog with missing 7.0.1 info 
2026-03-06 fix: prevent false UTF-7 detection of ASCII with ++ or +word (#332) (#335) 
2026-03-06 fix: eliminate 0.5s startup cost by computing model norms during loading (#333) 
2026-03-06 feat: add 1st detect and max columns to compare_detectors output 
2026-03-06 fix: correct import time measurement when --pure is used 
2026-03-06 refactor: replace unwieldy tuple returns with _TimingResult dataclass 
2026-03-06 fix: display startup times in milliseconds to avoid rounding to 0.000s 
2026-03-06 Fix issue where language was not returned by charset_normalizer 
2026-03-06 fix: generalize warmup comment to apply to all detector types 
2026-03-06 feat: add --no-memory flag and "time to 1st result" column to compare_detectors 
2026-03-06 perf: use struct.iter_unpack for bulk model parsing 
2026-03-06 fix: detect truncated model data with iter_unpack and extract parser 
2026-03-06 fix: normalize language names to ISO 639-1 for cross-detector comparison 
2026-03-06 docs: update benchmark numbers for chardet 7.0.2 
2026-03-06 test: add coverage for struct.error and UnicodeDecodeError paths 
2026-03-06 Update incorrect date in LICENSE 
2026-03-06 fix: restore _MODEL_NORMS in mock_models_bin fixture to prevent test slowdown 
2026-03-07 feat: pin test-data cloning to chardet release version tags 
2026-03-07 test: add unit tests for get_data_dir cache logic 
2026-03-07 docs: add test-data tagging step to versioning notes in CLAUDE.md 
2026-03-07 fix: remove v prefix from test-data tags to match release tag format 
2026-03-07 Fix xpasses 
2026-03-08 Fix undocumented encoding name changes (#338) 
2026-03-09 docs: add 7.0.2 changelog entry 
2026-03-09 Update benchmark numbers and fix subprocess import error 
2026-03-10 Improve ISO-2022-JP family escape sequence detection 
2026-03-10 docs: add design spec for switching to Python codec canonical names 
2026-03-10 docs: add implementation plan for switching to Python codec canonical names 
2026-03-10 fix: patch chardet.__version__ directly in test_utils 
2026-03-10 fix: build mypyc wheel explicitly in compare_detectors --mypyc 
2026-03-10 refactor: replace _LEGACY_NAMES with _COMPAT_NAMES (codec name keys) 
2026-03-10 feat: add compat_names and prefer_superset parameters to detect() 
2026-03-10 feat: add compat_names and prefer_superset to UniversalDetector 
2026-03-10 refactor: rename apply_legacy_rename to apply_preferred_superset 
2026-03-10 refactor: switch pipeline and equivalences to Python codec names 
2026-03-10 test: update all assertions for Python codec name internals 
2026-03-10 refactor: update registry EncodingName and train.py to use Python codec names 
2026-03-10 refactor: remove redundant EncodingInfo.python_codec field 
2026-03-11 refactor: clean up post-codec-name-switch and document new API parameters 
2026-03-11 refactor: replace manual caches with functools.cache, consolidate normalization 
2026-03-11 docs: update accuracy to 98.2%, use prefer_superset for accuracy eval 
2026-03-11 test: replace old benchmarks with three-layer performance regression suite 
2026-03-11 test: tune benchmark thresholds based on measured baselines 
2026-03-11 docs: add -n auto to pytest commands, fix markdown spacing 
2026-03-11 refactor: deduplicate code and derive inverse dicts from single sources 
2026-03-11 fix: add chardet.universaldetector stub for 6.x backward compatibility 
2026-03-11 feat: detect PEP 263 encoding declarations (# -*- coding: ... -*-) 
2026-03-11 chore: remove docs/plans/ design and plan files 
2026-03-11 docs: add threaded benchmark design spec 
2026-03-11 docs: address spec review feedback for threaded benchmark 
2026-03-11 docs: add threaded benchmark implementation plan 
2026-03-11 feat: add --threads option to benchmark_time.py for concurrent detection 
2026-03-11 feat: add --threads passthrough to compare_detectors.py 
2026-03-11 fix: only include threads in timing cache keys, not memory cache keys 
2026-03-11 fix: add --threads validation and docstring updates in compare_detectors.py 
2026-03-11 Remove plans that got thrown in other directory 
2026-03-11 docs: update thread scaling table with GIL vs free-threaded benchmarks 
2026-03-11 fix: adjust benchmark speedup threshold for pure Python vs mypyc 
2026-03-11 test: achieve 100% test coverage 
2026-03-11 refactor: use pathlib.Path instead of str for filesystem paths in scripts 
2026-03-11 perf: add early-exit check in PEP 263 detection for non-Python data 
2026-03-11 docs: expand changelog with contributor attribution, PR links, and charade history