2 Commits

Author	SHA1	Message	Date
teamchong	6d1c46dd20	fix(cache): pin prefix-cache anchor to the byte-stable history image ... 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.	2026-06-26 00:17:10 -04:00
teamchong	8417380061	test: e2e guards for cache stability, dashboard honesty, and design behaviors ... Test-only (no src changes). Adds fake-upstream + real-createProxy suites: - cache-stability-e2e: byte-identical cacheable prefix across growth, marker conservation + relocation onto the history image, tool-pair integrity. - savings-math-e2e: gate never images at a net loss; baselineImagedTokens cross-checked against the real o200k tokenizer; baselineTokens wired from the count_tokens probe. - savings-honesty: categorical no-overclaim invariants (warm <= cold, saved==delta*weight, zero credit on passthrough) + per-model pricing guards (Anthropic 1.25/0.1 shared policy; GPT 0.1x model-gated). - design-behavior-e2e: system-prompt imaging, history collapse (old imaged / recent legible), tools-in-recent-turns kept usable. - dashboard-api: GPT cold-cache parity (full text delta, not 0.1x warm rate). Each guard mutation-verified (broke source, confirmed red, reverted).	2026-06-23 12:30:16 -04:00