Volatile env/context text (git status, cwd, date) rode in req.system —
BEFORE the slab anchor in Anthropic's prefix order (tools → system →
messages) — so any git-state change cold-restarted the entire anchored
prefix. Telemetry attribution (events.jsonl 2026-06-26..07-02): 48.8%
of cold-create waste, ~2.6k tokens/session vs ~200 saved by imaging it.
Now appended as a trailing text block on the LAST user message — the
per-turn live tail that re-caches incrementally anyway — placed AFTER
history collapse (never baked into frozen chunks) and after tool_result
compression. Session-stable billingLine/sysRemainder stay in system;
fallback keeps env in system when no user message exists to carry it.
New telemetry field: envRelocatedChars.
Fix#1 (cross-session cache bust): strip the volatile "# Environment"
markdown section (working dir, git status, platform, model ID) out of
the system text BEFORE the static/dynamic split. It carries no XML
wrapper so splitStaticDynamic couldn't catch it, and its git-status
lines change across sessions - baking them into the slab PNG busted
the cross-session cache (system_sha8 717f1fce -> 5efaa4bb for a
one-file edit). Parallel to stripBillingLine: the section re-enters
the system tail as plain text.
Schema handling simplified, knob removed: the Anthropic text-reference
path now renders prose-only tool docs (schemas stay untouched in
tools[] - duplicating them in the reference was pure bloat), while the
GPT imaged path always carries the compact schema (there it IS the
compression). Deletes the {type:'object'} stub + SCHEMA_STRUCTURAL_KEYS
machinery, stripSchemaDescriptions import, and the COMPRESS_SCHEMAS env.
Tests: e2e regressions for anchor relocation onto byte-frozen carry-over
history images and first-collapse anchor staying on the slab; history
relocation fixture grown past the collapseChunk=50 snap (56 messages ->
cutoff 50, frozen windows 11/21/31/41, collapsedTurns 49 - the old
35-message fixture floored to one window and never froze a chunk).
tsc clean; 615/615 tests pass.
The text-based Tool Reference triggered Anthropic's model-cloning
safeguard (stop_reason: refusal -> silent Opus fallback) because the
per-tool stub said docs lived in "the system prompt" — the exact
phrasing the 169521c retrip identified as the trigger for the imaged
slab, now reintroduced in text form.
- Stub now reads: 'ⓘ Full docs: see "## Tool: <name>" in the Tool
Reference section.' — no "system prompt"/"authoritative" framing.
- Tool Reference header is provenance-framed as first-party ("pxpipe
(this user's local proxy) moved the full tool documentation...").
- tracker.ts now maps tool_docs_chars into events.jsonl so refusals
are attributable to the text-reference path.
- Regression test: stub + reference header must never match
/system prompt|authoritative/i and must carry provenance framing
(scoped to the header; quoted third-party tool docs below it may
legitimately contain the phrase).
Verified: 614/614 tests, tsc --noEmit clean, and a live cold-start
through the rebuilt proxy on claude-fable-5 with the text reference
active — no refusal event, no fallback.
Measured 2026-07-01 (count_tokens sweep, claude-sonnet-4-5; see
docs/LEGIBILITY-AUDIT-2026-07-01.md): the API downscales every image to fit
BOTH long-edge ≤1568 AND ~1.15 MP (≈1,143,750 px), then bills ≈px/750
(~1525 tok/img cap). The old 1932×1932 page hit the cap but was resampled
0.555× before the vision encoder, so 5×8 glyphs arrived at ~2.8×4.4 px — the
root cause of the legibility misses this session.
New page shape 1568×728 = 1,141,504 px fits both bounds → glyphs reach the
encoder WYSIWYG (and still ≤2000 px/side for >20-image requests).
render.ts geometry:
MAX_HEIGHT_PX 1932 -> 728
MAX_WIDTH_PX 1932 -> 1568
DEFAULT_COLS 313 -> 312 (1568 px exactly; 313=1573 would 0.997× blur)
DENSE_CONTENT_COLS 384 -> 312
READABLE/DENSE chars 50000/92160 -> 28080 (312×90, tracks real pagination)
Decouple the GPT path: OpenAI resizes differently (2048 bbox, 768 short side),
so a 768-wide strip up to 2048 tall survives un-resampled. Add
GPT_MAX_HEIGHT_PX = 1932 (gpt-model-profiles.ts) where the built-in cost
numbers were calibrated; openai-history.ts now uses it instead of the
now-Anthropic-specific MAX_HEIGHT_PX. Doc-only touch-ups in library.ts/export.ts.
tests/render + tests/paging updated to the new geometry (171 pass).
- extractFactSheetEntries() returns {token, count}; the kept-token set
and order are byte-identical to the old extractFactSheetTokens(),
which now delegates. Counts render as a ×N suffix, so tally questions
over imaged content are answerable from the text sheet instead of by
counting 5x8 px glyph rows.
- Same-token spans matched by overlapping patterns dedupe by offset
(token + match index) so nothing double-counts.
- New tier-0 shape: uppercase hyphenated codes with a digit
(PROJ-1482, CVE-2024-30078); digit lookahead is bounded.
- export.ts consumes entries across all pages; 14 new/extended tests.
A fresh same-session prior within the TTL is no longer sufficient to price
the text counterfactual warm: deriveBaselineWarmth now also requires the
static-prefix hash (system_sha8) to match. When opencode rotates the system
prompt / tool docs mid-session, the cacheable prefix changes, so a text-only
client would hit a new provider cache key too — pricing it warm against a
cold actual fabricated a huge phantom "loss" (the dashboard's 800%-worse
report). cr>0 still rescues a genuine warm read with no in-memory prior.
Wired through update(), replay(), and aggregateSessions via system_sha8.
Also surface losses honestly in the recent table (Saved/lost: negative
deltas in red instead of hidden as "—") and clarify headings as
billing-equivalent input tokens. Docs updated to match.
Drop the duplicate CHARS_PER_TOKEN=3.7 from export.ts and import REPORT_CHARS_PER_TOKEN from transform.ts so the reporting-estimate constant has one source of truth. Clarify the dashboard baseline-warmth invariant comment. No behavior change.
The savings accounting priced the text baseline as cold whenever pxpipe's own
image cache missed this turn (cr==0), fabricating a 1.25x create the text path
would never have paid and inflating reported savings ~2x. Decouple them: the
text prefix reads warm whenever a fresh same-session prior exists within the
300s TTL (wall-clock), unioned with an observed read (cr>0) for the post-restart
case. Centralised in deriveBaselineWarmth; used by all three call sites
(sessions, dashboard, fragments).
Empirical replay over ~/.pxpipe/events.jsonl (13,402 message rows): honest
headline 504.6M tokens saved vs the old cr-gated 1.05B; 1,409/12,305 fresh-prior
rows (11.4%) read warm despite a busted image cache. Dashboard now narrates the
busted-image case explicitly. Adds baseline/sessions/context-map regression
tests. Measurement only — no change to proxy behavior.
typecheck + 600 tests + build all green.
The magic-word @pxpipe directive fired unreliably and added per-request body
scanning to the hot path, so drop it entirely: removed the directive module +
its test and unwired it from transform.ts / proxy.ts / node.ts / index.ts.
transformRequest now leaves message bodies byte-identical — no per-request
directive parsing.
In its place, `pxpipe export <paths>` renders code/text to dense PNG pages via
the same SDK primitive the proxy uses, so exported pages are byte-identical to
what ships to the model. Width is locked to proxy density (--cols rejected as
an unknown option, guarded by tests) to prevent drift. Added --open to preview
the rendered pages plus a result footer (artifact summary + token-savings line).
Tests: export.test.ts 64 passed (incl. --open parse + default coverage); full
suite 589 passed / 29 files; typecheck clean.
Intermittent prefix-cache busts on long sessions (#11): the single cache
breakpoint relocated onto the LAST history image — the still-growing chunk
whose bytes change every window advance — so the slab+history prefix
re-created at 1.25x instead of being read.
- relocateAnchorToHistoryImage pins collapseHistory's carry-over ordinal
(the last byte-stable chunk) instead of the last image.
- demoteProtectedHeadText keeps pxpipe's slab scaffolding (images +
fact-sheet + the [End of rendered context.] boundary) verbatim and only
quarantines the user's stale opening turn, so the relocator can still
find the slab anchor (#14 demotion had clobbered the boundary it keys on).
- cachePrefixDigest joins parts with \x00 so block-boundary differences
can't hash-collide into false prefix-stability.
520/520 green, tsc clean.
The 64-token budget was filled longest-first, so long low-risk doc-URLs evicted short zero-redundancy tokens (git SHAs, ports, CLI flags, CONST_IDS) — the strings a coding agent must reproduce verbatim. Allocate by priority tier (ids/flags/numbers > paths/versions > URLs, capped); preserve substring-collapse and byte-stable, cache-safe output. Adds an eviction regression test.
Recovers precision-critical strings (paths/ids/versions) from the imaged
slab as cache-stable text so they survive OCR. Byte-identical across turns,
validated on both Claude and gpt-5.5 paths.
Autonomous GPT agents (OpenCode/gpt-5.5) send ONE human request then a long
run of tool turns. The lone request is the OLDEST turn, so history collapse
imaged it first and the model lost it — "I wonder what the user actually asked"
→ off-task drift (observed: agent edited compaction.ts instead of answering a
compare question). The live-request guard's "the request is the trailing user
message" heuristic assumes interactive chat and points at nothing here.
Fix: keep the most-recent user turn OVERALL as legible TEXT, spliced between
before-pin and after-pin history images inside the synthetic user message;
older user turns stay imaged (must not look live — snap-to-first-prompt guard).
The guard now echoes the request verbatim (capped). History is imaged on both
sides of the pin, so compression barely changes.
Cache safety (adversarially reviewed):
- Pin ONLY when the latest user turn is INSIDE the collapse range. If it's in
the kept tail (ordinary interactive turn) it's already native text — pinning
an older in-range turn would migrate the pin across collapse-chunk boundaries
and re-image frozen history. Restricting to the latest turn fixes its position
until the next prompt, so before/after sections stay byte-stable across a run.
- Undersized before-pin remainder merges into the previous before-section rather
than emitting a sub-threshold (net-negative) image.
Both Chat Completions and Responses paths. 473 tests pass; tsc + build clean.
Not yet released — validate on the gpt-5.5 machine first.
b9418bf repriced cr>0-but-no-prior turns warm in dashboard.ts (update + replay)
but left the identical gate in sessions.ts unfixed — so the Sessions panel still
fabricated inflated savings after a restart/eviction or on the first tracked turn
(a cr>0 turn priced cold bills the text counterfactual a 1.25x create on a prefix
we KNOW was cached). Mirror the dashboard fix so "honest cache math" holds on every
panel.
- sessions.ts: warm follows the observed read (cr>0) alone; with no fresh prior,
assume the cacheable prefix was fully reused (prevCacheable = cacheable) rather
than mispricing a known-warm read.
- sessions.test.ts: the "real prefix compression" case had cr=100 on its first
turn (observably warm) yet asserted the cold-priced 22490 fabrication; corrected
to the honest 1790 (warm) + 95 = 1885. Now a regression guard for this fix.
- dashboard.ts: drop the stale "no per-session state" replay comment — replay now
mirrors update()'s per-session warmth.
Found by adversarial review of b9418bf. 462 tests pass; tsc clean.
Collapsed-history images now carry who-said-what AND when, instead of leaving
the model to reconstruct it from a flattened, role-ambiguous blob (which led it
to resurface the opening turn as if it were the live request).
- Turn-index recency anchor: each collapsed turn serializes as <user t="N"> /
<assistant t="N"> with an ABSOLUTE turn index (larger N = more recent), so the
model can tell turn 1 from turn 60. Absolute (never "N ago"/"i of total") so
frozen chunks stay byte-identical and keep hitting the prompt cache. Mirrored on
the GPT path. (history.ts, openai-history.ts, openai.ts)
- colorByRole: role tags are tinted via a parallel "slot string" carried from
serialize time (structure-through), replacing the parse-back that miscolored a
body quoting a literal <tag>. (render.ts, history.ts)
- neutralizeSentinel: a pre-existing ↵ (U+21B5) in content is swapped to ⏎
(U+23CE) in render-prep so reflow packs newlines instead of bailing to a raw,
unpacked render — common when the content is about pxpipe itself. Render-only;
originals preserved. (render.ts, transform.ts, history.ts, openai-history.ts)
- Per-model GPT vision/render profiles, retunable via PXPIPE_GPT_PROFILES,
behavior-identical to the old hardcoded values. (gpt-model-profiles.ts)
Review fixes folded in:
- Banner intro/outro consolidated to a single source of truth; the GPT path now
aliases the Anthropic constant instead of byte-copying it (can't drift).
- slotCopyBody neutralizes literal slot markers to a width-equivalent control
char (U+0003), not a space the minifier would strip and misalign.
459 tests pass; tsc clean.
Collapse old conversation history into rendered PNG sections so the model
reads a compact image instead of re-billed text, while preserving prompt
caching and tool-call behavior. Measures real vs compressed token/cost.
Core:
- GPT history collapse (openai-history.ts): append-only, o200k token-length
sectioning. Sections seal only at a tool-closed boundary (open call-id set
empty), so a function_call and its function_call_output never split across
the collapse cut. Fixes the OpenAI 400 "No tool call found for function
call output with call_id ..." that hit long Responses-API sessions.
- Anthropic cache contract (history.ts): append-only per-chunk rendering;
cache_control markers are preserved/moved, never added; chunk boundaries
align with caller marker seams for byte-stable prefix caching.
- GPT image budget (openai.ts): detail:'original' for gpt-5.x, flagship
vision-multiplier fix, patch cap; schema-strip preserves real descriptions.
- Savings accounting (openai-savings.ts): cached_tokens + vision-token basis.
Model scope (applicability.ts):
- Default imaged scope = claude-fable-5 + gpt-5.6.
- gpt-5.5 and claude-opus-4-8 stay opt-in: same pipeline, but they degrade
reading dense imaged history (gist drift), so silently imaging them by
default is wrong. Promotion is gated on an OCR/recall threshold.
Dashboard: GPT + Anthropic rendering, per-family model toggles, persisted
metrics, thumbnail-expired session UI, reflow/newline handling.
Tests: cache-alignment (GPT + Anthropic), history sectioning + tool-boundary
invariants, savings, dashboard, sessions/restart-restore. 452 passing.
The history image sits after the slab in prefix order, but the single cache
breakpoint was anchored on the slab. So the largest block — the ~141k-token
history image — only cached when the caller's roaming downstream marker happened
to land after it. When it didn't, the whole history image re-created at the 1.25x
cache_create rate every turn instead of amortizing into 0.1x reads. On a warm
session that turned a real compression win into a net loss (the "411% more"
the dashboard correctly surfaced).
Fix is pure relocation: move pxpipe's single breakpoint from the slab onto the
LAST history image (which sits after the slab), so slab + history cache as one
stable prefix — created once, then read. Marker count is unchanged: pxpipe still
never ADDS a marker (Task #21), it only moves the caller's existing one. When no
slab imaged, the history path keeps its own relocation.
- transform.ts: relocateAnchorToHistoryImage on the collapse-success branch
- history.test.ts: two old "history carries no marker" invariants upgraded to
assert the relocation (last history image carries it; exactly one marker total)
replay() rebuilt RecentRow from the JSONL but never set
session_saved_so_far_delta, img_id, or contextHistory — so after a restart
old rows showed "-" in Saved and had no Details link, while live rows did.
Live update() does all three; replay() now matches.
- replay() sets session_saved_so_far_delta (baselineInputEff - actualInputEff,
same cache-weighted math as live) so the Saved column survives a restart.
- replay() rebuilds the Context Map breakdown from persisted fields
(baseline_tokens, bucket_chars, image_count, usage) with a synthetic
nextImageId, and sets img_id/img_ids so the Details link resolves.
- The PNG ring is in-memory and not restorable; restored entries carry
imageIds:[] and a `restored` flag, and the Details panel shows
"thumbnails expired when the proxy restarted" instead of dead <img>s.
- +2 replay tests (restart-restore.test.ts).
376 tests pass; typecheck + build clean.
Claude-Session: https://claude.ai/code/session_01RV8uiMYNhrAdTUzJ9fkpcp
The session hero computed (1 - sent / raw_count_tokens_baseline) — the same
cache-blind math just removed from the Details panel. It priced the all-text
baseline at full rate, ignoring that most of it would have been cheap
cache-reads, so a warm net-loss session showed a big "fewer tokens" win up top
while Details/Saved showed a loss. Two panels, one session, opposite signs.
- renderSessionSummaryFragment now reads baselineInputWeighted /
actualInputWeighted (the same cache-weighted pair as Details + the Saved
column) instead of rawActualTokens / rawBaselineTokens.
- Headline is input-only; dropped the output-on-both-sides lumping (output is
never "sent" and only dampened the %).
- Honest labels: "effective tokens … after normal cache discounts"; still no $
assumptions (0.1x/1.25x are token multipliers, not $/Mtok).
- types.ts: corrected stale field comments (raw fields are math-drawer only).
- +4 hero tests pinning direction to the weighted pair and that output can't
move the headline %.
374 tests pass; typecheck + build clean.
The Details panel divided the raw count_tokens baseline by sent tokens
(cache-blind), over-claiming "X% smaller" even when the cache-aware row
showed a net loss — the two panels could flatly contradict each other.
- dashboard.ts: feed baselineInputEff/actualInputEff/haveBaseline into
ContextMapData (same weighted pair the recent row uses); push after
the eff-tokens are computed so the breakdown matches.
- fragments.ts: headline divides weighted baseline by weighted actual,
says "bigger" on a net loss, with a clarifying sub-line; no savings
claim when the baseline probe did not resolve.
- +4 tests (context-map.test.ts) pinning headline direction to the row.
370 tests pass; typecheck + build clean.
- Generalize isPxpipeSupportedGptModel to the GPT-5 family (gpt-5, 5.x,
-mini/-nano), default-on; [variant] tags stripped.
- OpenAI render switches to the 768px portrait strip (GPT_STRIP_COLS=152)
so the API's mandatory shortest-side->768 downscale never shrinks our
5px glyphs; downscale-free in both tile and patch regimes.
- Add OpenAI vision-token cost model (resolveVisionCost/openAIVisionTokens)
and rewire the Chat Completions profitability gate to use it instead of
the Anthropic 750px/token model.
- Add transformOpenAIResponses for the /v1/responses (Responses API) shape
used by Codex: instructions + input items + flat tools -> rendered
input_image parts; wire it into the proxy (was passthrough before).
- Tests: +12 (gate family, vision-token math incl. downscale path, chat +
responses transforms). 366 passing; Anthropic path unchanged.
README intentionally not updated (GPT OCR fidelity unverified until tested).
- keepSharp: caller predicate pins exact-match-critical blocks (IDs, hashes,
paths) as text, overriding the chars/token heuristic. Reported via
info.keptSharpBlocks. Never forces imaging; throwing predicate = false.
- emitRecoverable: optional recovery map (block -> original text + provenance)
so a stateful caller can re-inject or re-fetch imaged content. The recover
half of the fidelity contract; documented mitigation for lossy recall.
- edge/Workers-safe: process.env read is typeof-guarded; @napi-rs/canvas moved
to devDependencies (atlas is build-time only, runtime PNG encoder is pure-JS).
- comments: trimmed ~1,640 lines of essay/derivation/changelog narration across
src/ (transform.ts -73%), keeping one-line rationale; deep math points to docs/.
- New exports/types in index.ts + library.ts; +12 tests (keep-sharp, recoverable).
Build clean; 354/354 tests pass.
The real-corpus reflow check read whole transcript files; on a large ~/.claude/projects (multi-hundred-MB files) that blew the 30s timeout and aborted 'pnpm test' (hence prepublishOnly). Read only the first 8MB per file — enough for the per-file sample; a truncated trailing line just fails JSON.parse and is skipped. Corpus test now runs in ~5s.
- "How your context works" panel: per-request token flow (as-text -> real) plus
the exact-char bucket breakdown of what became images and a gallery of every
rendered page, opened via a "view" link on each recent-requests row.
- "compress models" chips are the union of a catalog (Fable 5, Opus 4.8/4.7,
Sonnet 4.6, Haiku 4.5), the PXPIPE_MODELS env scope, and the active scope, so
any env-enabled model stays toggleable (off <-> on); runtime-only override.
- Opus is OFF by default (Fable-5-only scope); opt-in via env or the chips.
Fixes from the code review:
- contextHistory cap aligned to the recent table (was 30 < 50, so older "view"
links silently showed the latest request's breakdown); an evicted or
unrecorded request now shows an explicit "no longer available" message.
- the session headline phrases a net loss as "N% more tokens" instead of
rendering a garbled "-7% fewer tokens".
Per-turn and per-session savings are the real baseline_eff - actual_eff with no
floor: a net-losing turn (cache_create-heavy image rewrite that costs more than
the text prefix it replaced) now reports the real loss instead of a fabricated
0. Updates baseline.ts and the caller comments that claimed a >=0 clamp the code
never applied -- the negative is intended and covered by tests/sessions.test.ts.
Fable 5 / Opus 4.8 accept up to 2576px / 4784 visual tokens per image, but a
request with >20 images (pxpipe always sends many) is held to the stricter
<=2000px/side rule, so the real ceiling is ~1932x1932 (1928x1928 = 69x69 = 4761
tokens). MAX_HEIGHT_PX 1568->1932; dense tool/history pages now render at
DENSE_CONTENT_COLS=384 / DENSE_CONTENT_CHARS_PER_IMAGE=92160 (1928x1928 full
page) -- fewer image blocks at the same OCR-validated 5x8 cell. The static slab
is unchanged (313 cols / 1573x1280).
Also fixes a regression the code review caught: the break-even gate,
truncateForBudget, and estimateImageCount predicted against the slab geometry
(313 cols / 159 rows) while the dense renderer emits 384 cols / 240 rows, so
large tool_results were truncated far earlier than the 10-image cap required --
silently dropping output that would have rendered. A per-page char budget is
threaded through the prediction chain (defaults to READABLE so the slab and unit
tests are byte-identical) plus a denseGateGeometry helper, so the gate prices the
same page the renderer actually produces.
- applicability: isPxpipeSupportedModel reads PXPIPE_MODELS (comma-sep,
default claude-fable-5 only) and strips bracket/variant tags like [1m];
Opus becomes opt-in with no code change. Default behavior unchanged.
- FINDINGS: Opus 4.8 re-test - arithmetic 98/100 (-2pp), verbatim 6/15
(was 93/100, 0/15): improved but still taxed -> default stays Fable-only.
- FINDINGS + eval/glyph-matrix/sweep: root cause of the read tax is per-glyph
RESOLUTION, not font shape (confusions scale with px and vanish by 10x16).
Opus needs ~4x glyph area to read reliably; the 1568px ceiling makes that
break-even, so there is no profitable Opus operating point.
- src/dashboard/fragments.ts: server-side HTML fragment renderers reusing the
same JSON payloads (HTML and JSON surfaces can't drift)
- node.ts/dashboard.ts: /fragments/<name> routes (header, session-summary,
recent, latest, sessions, stats, toggle) with htmx polling + Alpine for
local state; toggle is a POST-returning-fragment htmx swap
- vendored htmx 2.0.4 + Alpine 3.14.9 in src/dashboard/vendor.ts (offline,
single-file npm package, no CDN)
- deleted Svelte components/stores/bundle build step; dropped svelte/vite
devDeps; build is now just tsc + esbuild
- tests: +5 fragment contract tests (routing, toggle state, HTML escaping of
source text, 404) - 339 total
- PXPIPE_PROVIDER=cloudflare-ai-gateway + PXPIPE_GATEWAY_BASE_URL derive both
family routes ({base}/anthropic, {base}/openai) from one configurable base
- PXPIPE_GATEWAY_HEADERS injects auth headers (JSON or k=v;k2=v2) on every
upstream request incl. count_tokens probes
- OpenAI paths drop /v1 to match gateway shape; Anthropic paths unchanged;
unknown paths pass through on the family route; streaming untouched
- no hardcoded hostnames; tests use fake gateway URLs/tokens (14 new)
The prior commit captured only the rename (a stale pathspec aborted the
content staging). This applies the actual edits: retitle to FINDINGS,
'## Verdict' + superseded TL;DR, and the two cross-reference updates.
Widen the model gate to /^claude-opus-4-(?:[7-9]|[1-9]\d)(?:-|$)/ (Opus 4.7
and newer; previously 4.6/4.7). Wire isPixelpipeSupportedModel into the proxy
boundary in proxy.ts — the proxy previously gated on economics only and
ignored the model, so it compressed 4.8 traffic despite the docs claiming a
4.6/4.7 scope. Unsupported models now pass through with reason
'unsupported_model'.
Update public-api tests to the 4.7+ spec (320/320 pass).
Correct the docs to live measurement: reverse the POSTMORTEM "dead" verdict
(pixelpipe is a lossy gist-compressor saving ~68% on real dense Claude Code
traffic; the verbatim 0/15 needle finding stands as a caveat, not the
verdict), rewrite README Status/Limitations, and add a correction pointer to
the eval README. Original POSTMORTEM body preserved below the correction.
BREAKING CHANGE: Opus 4.6 and older are no longer supported.
Verbatim-risk guard (skip imaging unique IDs/hashes/exact values) still pending.
teamchong