feat: audit Codex context savings

CHANGELOG.md

@@ -4,6 +4,32 @@ All notable changes to this project are documented here. The format follows [Kee
 
 ## [Unreleased]
 
+## [0.2.0-alpha.1] — 2026-08-18
+
+### Added — context behavior audit
+- Added `denser audit` and the `audit_context` Python interface for comparing a
+  baseline with any rewritten, selectively loaded, or externally compacted
+  textual context snapshot.
+- A positive verdict now requires exact covered-case parity plus a detected
+  regression in a caller-supplied known-bad negative control. Equal scores
+  without a sensitive control are reported as inconclusive.
+- Audit reports separate local asset-length estimates from provider-reported
+  full input usage, so file compression is not presented as end-to-end savings.
+- Added an explicit Codex CLI `text-only` capability profile for pre-bundled
+  tasks that need no tools, files, network, plugins, apps, skills, or memory.
+  A seeded, randomized, three-trial audit completed all 84 paired-profile calls
+  without operational errors or transport fallbacks. Both profiles passed all
+  covered cases while `text-only` reduced provider-reported input per call by
+  10.55% and 10.60% across the two workloads.
+- Added a reproducible capability-profile benchmark and a public per-call
+  evidence report. An initial strict run exposed one missing output-contract
+  behavior; `text-only/v1` fixes that boundary and the full audit was rerun.
+
+### Changed — behavior-fidelity pivot
+- Repositioned denser from a compression-first tool to an evidence layer for
+  context changes. Existing compression and density commands remain available
+  as experimental candidate-generation tools.
+
 ### Added — deterministic behavior replay
 - Added `denser replay` and a Python replay API that run instruction assets as
   system instructions against explicit workload prompts.

CITATION.cff

@@ -4,14 +4,14 @@ authors:
   - family-names: Wang
     given-names: Bill
     alias: BillWang
-title: "denser: Evidence-Guided Refactoring for LLM Instructions"
-version: 0.1.0
-date-released: 2026-04-14
+title: "denser: Behavior-Fidelity Audits for Version-Controlled LLM Context"
+version: 0.2.0-alpha.1
+date-released: 2026-08-18
 url: "https://github.com/Evostructs/denser"
 license: Apache-2.0
 keywords:
   - large-language-models
-  - prompt-engineering
-  - prompt-compression
+  - context-optimization
+  - regression-testing
   - agents
   - behavior-evaluation

benchmarks/README.md

@@ -4,6 +4,24 @@ Runs the small bundled example corpus for development. This is not yet a
 publishable behavior benchmark: the default fixtures are structural checks and
 the corpus has eight worked examples.
 
+## Paired Codex capability-profile audit
+
+The repository's strongest end-to-end token claim is reproduced by running the
+same frozen behavior cases under Codex CLI `standard` and `text-only` profiles.
+Calls are submitted in a seeded randomized order, with three trials per case by
+default. The script refuses to overwrite an existing report.
+
+```bash
+python benchmarks/codex_profile_audit.py \
+  --trials 3 --workers 8 --seed 20260817 --respect-system-proxy \
+  --output build/codex-profile-audit.json
+```
+
+This performs 84 authenticated Codex calls. Use `text-only` only for workloads
+that need no files, commands, network, plugins, apps, skills, or memory. The
+published run and exact interpretation are documented in
+[`docs/CODEX_TEXT_ONLY_CASE_STUDY.md`](../docs/CODEX_TEXT_ONLY_CASE_STUDY.md).
+
 ## What it does
 
 1. Iterates over all curated example pairs in `examples/`