docs: add Entroly reference to prompt caching guide - #2346
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## Summary - accumulate declared, nested, and unknown numeric OpenAI/Anthropic usage fields across retries while preserving non-numeric metadata - add corrective feedback when a Responses API retry receives no tool call - preserve raw iterable type hints through sync and async v2 parallel-tool wrappers - strengthen API-key-free coverage for current and future SDK usage counters ## Consolidated and superseded items - closes #2493 - consolidates contributor work from #2498, #2500, and #2501 with original commit authorship preserved - supersedes #2497 because it drops unknown `model_extra` counters - supersedes #2499 because its hand-maintained provider field lists would drift as SDKs evolve ## Validation - focused changed-surface suite: `110 passed` - broad offline v2/coverage suite: `2368 passed, 91 skipped, 73 deselected` - Ruff check and format check: passed - scoped `ty check`: passed - `uv lock --check`: passed - pre-commit hooks and `git diff --check`: passed The 73 deselected tests require live provider credentials. An unfiltered local run confirmed its 22 failures were provider network connections in the restricted environment; GitHub provider jobs remain the authoritative validation for those paths. ## Intentionally skipped - provider additions or expansions: #2436, #2435, #2423, #2409, #2384, #2322, #2306, #2298, #2283, #2168, #2086; issues #2408, #2383, #2365, #2260, #2084, #2076 - broad architecture, product, security, or streaming decisions: #2394, #2392, #2357, #2356, #2355, #2351, #2321, #2307, #2287, #2263; issues #2479, #2403, #2393, #2391, #2316, #2272, #2056 - dependency batch: #2433 - nontrivial examples and editorial/resource additions: #2468, #2405, #2401, #2354, #2346, #2311, #2305; issue #2404 These remain open because they need dedicated product, architecture, provider, security, dependency, or editorial review and are not required for the `1.15.5` patch release. <!-- CURSOR_SUMMARY --> --- > [!NOTE] > **Medium Risk** > Changes retry usage totals and reask message content on failure paths; scope is limited and heavily covered by tests, with no auth or data-store changes. > > **Overview** > Bundles three v2 retry and wrapper fixes for a patch release. > > **Retry usage accounting** replaces hand-maintained token field sums with generic `_accumulate_models` on Pydantic usage objects. Numeric fields (including nested models and `model_extra` counters) add across retries; booleans and other non-numeric metadata are not treated as billable. OpenAI and Anthropic paths share this logic. > > **OpenAI Responses reask** appends a user correction when `RESPONSES_TOOLS` validation fails but the output has no tool calls (e.g. reasoning-only), so retries include feedback instead of repeating the same request. > > **Parallel tools** in `patch_v2` skips `prepare_response_model` and does not replace `response_model` with the handler’s prepared wrapper for parallel modes, keeping raw `Iterable[...]` hints so schemas and parsed results include every member type. > > <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit bbddca1. Configure [here](https://www.cursor.com/dashboard/bugbot).</sup> <!-- /CURSOR_SUMMARY -->
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What this PR adds
Adds Entroly as a See Also reference in the Prompt Caching documentation.
Why it fits:
The prompt caching doc explains how to manually set
cache_controlto get Anthropic's cache discount. Entroly automates the complementary problem: keeping the context prefix byte-stable so the cache actually hits across requests.Without prefix alignment, even with
cache_controlset, context re-ranking or dynamic content changes bust the cache. Entroly's Cache Aligner solves this transparently.Additionally, Entroly compresses input context by 70-95%, reducing the tokens that need to be cached in the first place.
Change:
docs/concepts/prompt_caching.mdApache-2.0, local-first, no outbound analytics by default.