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Breaking

Study finds context compactors retain only 17% of standing agent rules

A University of Pennsylvania study found common compactors retained only 17% of standing session rules while preserving task information. Practitioners use verified Markdown handoffs and background compaction to manage long coding-agent runs.

Study finds context compactors retain only 17% of standing agent rules
New
Coding Agents·17th August·6 min read
Breaking

Codex opens 1M-token GPT-5.6 Sol context for ChatGPT subscribers

Codex now lets ChatGPT subscribers enable a 1 million-token context window for GPT-5.6 Sol. Automatic compaction starts at 900,000 tokens, and tokens beyond the default window count double against limits.

Codex opens 1M-token GPT-5.6 Sol context for ChatGPT subscribers
New
Codex·16th August·3 min read
Breaking

Agent builders test task-specific harnesses; AGENTS.md eval logs 288 runs

Practitioner posts argued agent evals should check final world state and tool-call trajectories, not just single outputs. A 288-run AGENTS.md test found context files did not improve correctness.

Agent builders test task-specific harnesses; AGENTS.md eval logs 288 runs
New
Context Engineering·2w ago·7 min read
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