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wire 2026-08-01
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$ the-wire · showcase

TAU FIXES ANTHROPIC BILLING LEAK, UNLOCKS PROMPT CACHING

By RepoJournal · Filed · About Hugging Face · Composed from the cited sources · methodology

rian-dolphin imstevenpmwork albertvillanova qgallouedec ovuruska moon-bot-app alejandro-ao
14 people shipped this
rian-dolphin @rian-dolphin 3 cited imstevenpmwork @imstevenpmwork 2 cited albertvillanova @albertvillanova 1 cited qgallouedec @qgallouedec 1 cited ovuruska @ovuruska 1 cited moon-bot-app @moon-bot-app 1 cited alejandro-ao @alejandro-ao AmineDiro @AmineDiro Recoordinate @latent-9 Ashmitha R @Ashmitharaja BenjaminBossan @BenjaminBossan dependabot @dependabot github-actions[bot] @github-actions[bot] moon-bot-app[bot] @moon-bot-app[bot]

Tau shipped critical fixes for Anthropic subscriptions today, plugging a prompt caching hole that was re-billing identical system prompts on every single turn.

Tau 0.3.5 landed with the caching layer developers have been waiting for [1]. The library had wired up the *reporting* side of Anthropic's prompt cache (parsing cache_read, cache_write, and ephemeral_1h_input_tokens from responses) but never actually *requested* caching in payloads, so every turn re-billed the system prompt, tool schemas, and conversation history as fresh input [3]. In parallel, rian-dolphin patched three separate OAuth bugs blocking Anthropic subscription login entirely: a typo in the client ID where one character stood between users and "Invalid client id" errors, broken token refresh that would kill credentials overnight, and auth URL handling that failed under load [2]. On the TRL front, GRPO, DPO, KTO and RLOO now respect frozen reference adapters when working with PEFT's `target_parameters` on peft>=0.20.0, instead of always falling back to the base model [4]. Separately, DPO now rejects unsupported f_divergence_type combinations that were either silently ignored or half-wired at init time [5]. LeRobot merged robotics-specific image augmentations (8 transforms for real-world robustness), fixed a double-reset bug in LiberoEnv that paid two full resets per episode termination, and improved Hub checkpoint diagnostics for legacy models [6][7]. The huggingface.js inference client shipped text-to-speech support for DeepInfra and reordered conversational payloads to put `model` first, enabling prefix-based routing for proxies instead of forcing buffering to identify providers [8][9].

Action items

References

  1. [1] Cache Anthropic prompts instead of re-billing every turn ↗ huggingface/tau
  2. [2] Fix Anthropic subscription login and OAuth token refresh ↗ huggingface/tau
  3. [3] Cache Anthropic prompts instead of re-billing every turn (#502) ↗ huggingface/tau
  4. [4] Use a reference adapter with `target_parameters` on `peft>=0.20.0` ↗ huggingface/trl
  5. [5] Reject unsupported `f_divergence_type` / loss type combinations in DPO ↗ huggingface/trl
  6. [6] feat(transforms): add 8 robotics-relevant image augmentations ↗ huggingface/lerobot
  7. [7] fix(libero): don't reset inside step() on termination (#4273) ↗ huggingface/lerobot
  8. [8] [Inference Providers] deepinfra: add text-to-speech support ↗ huggingface/huggingface.js
  9. [9] Serialize `model` first in conversational payloads ↗ huggingface/huggingface.js

$ ls huggingface/reviews/ # the step-back reads

the week in review OpenEnv 0.5.0 ships as typed clients get fixed the month in review Cache-billing leak fixed, and everything from robots to diffusers gets harder to break
Topics: Python AI / ML Full archive → Weekly reviews →

Quick answers

What shipped in Hugging Face on August 1, 2026?
Tau shipped critical fixes for Anthropic subscriptions today, plugging a prompt caching hole that was re-billing identical system prompts on every single turn. In total, 45 commits, 44 pull requests, and 2 releases landed.
Who contributed to Hugging Face on August 1, 2026?
14 developers shipped this update, including rian-dolphin, alejandro-ao, albertvillanova, AmineDiro, qgallouedec, Recoordinate, Ashmitha R, and BenjaminBossan, and 6 more.
What were the notable Hugging Face updates?
Cache Anthropic prompts instead of re-billing every turn, Fix Anthropic subscription login and OAuth token refresh, and Cache Anthropic prompts instead of re-billing every turn (#502).
♥

$ log @huggingface --recent

Flash and sage varlen prep work under torch.compile dynamic shapes 6 shipped OpenEnv closes soupsieve CVEs in two more envs, TRL reshapes GRPO log-probs 63 shipped OpenEnv 0.5.0 ships new public surface, capture proxy gains an admin key 48 shipped pwc-cli exposes every read-only command as an MCP tool 47 shipped

$ log --all # elsewhere on the wire

@openclaw Cold-start Gateway diagnostics stop crying wolf, doctor repairs plugin drift Agentic Coding Cline desktop bundles shrink, goose unblocks its own clicks

$ ls showcases/

Rails Django Laravel Node.js Go Vercel Vue.js Kubernetes HashiCorp Arch Linux Linux Anthropic

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