Openharness Daily: Sandbox Lockdown and Behavioral Training Pipeline
The sandbox shipped a breaking security overhaul in release 0.21, while a new Langfuse-based behavioral training pipeline replaced prompt mining. Cleanup work retired crons and tightened secret handling alongside those two shifts.
Duration: PT2M40S
Episode overview
This episode is a short developer briefing from Openharness Daily.
It explains recent repository work in plain language.
- Show: Openharness Daily
- Published: 2026-10-12T12:00:33Z
- Audio duration: PT2M40S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning, it's Monday, October 12th, 2026.
The headline is a harder sandbox boundary shipping as a breaking change, paired with a full behavioral training loop to replace one-off prompt mining.
First, sandbox lockdown. Release 0.21, in PR 1406, makes Compose init the process manager, which is the breaking change from PR 1399 that also drops old systemd privileges. Around that, PR 1398 adds an opt-in egress allowlist enforced outside the container through a proxy sidecar, with a shared host list and new log…
Second, secrets got stricter to match. PR 1408 blocks agents from printing raw secrets and limits sandbox secret writes to keys the container actually receives. PR 1411 fixes piped secret writes missing a trailing newline, and PR 1412 gives the X A I key a working path into the sandbox. Separately, PR 1431 removes a…
Second theme is behavioral training. PR 1414 retires the prompt miner and adds a staged run pipeline: inventory from Langfuse, sampling, normalization, validation, leakage-controlled curation, publishing, and reporting. Follow-ups matter for reliability. PR 1421 sets an approved capture limit and documents the…
Finally, simplification. PR 1392 retires scheduled…
Nearby episodes from Openharness Daily
- Weekly Recap - Sandbox Lockdown and Behavioral Training
- OpenShell Runtime Lands as Crons Retire
- 0.19.0 Release Finalized
- OpenClaw Support on Node 24 and Harness Install Hardening
- AGRO 0.18.0 Ships Fx Harness and Workspace Fixes
- Weekly Recap - Subtraction Enables Expansion
- Trustworthy Remote Tests, 0.17 Release, and Fx Proposal
- Sandbox Secrets and Remote VMs