Context engineering — fighting the rot — step 9 of 9
One last thing before we move on. Same surface as a write step — but the lesson doesn't complete until this passes.
Final context-engineering drill. Write manage_session(items, budget, threshold_pct)
that combines budget-planning with a compaction trigger.
Returns a dict with FOUR fields:
loaded: list of item names that fit in the budget (priority-desc, then name-asc; greedy fill)offloaded: list of item names that didn't fit (same sort order)load_pct: int 0-100, percentage of budget used (rounded to nearest,round(100 * used / budget))compact_targets: list of up to TWO item names — the LOWEST priority items currently inloaded. Only populated ifload_pct > threshold_pct; otherwise empty list. Order: priority ascending, then name ascending.
Five items, 4000-token budget, 75% threshold. Expected output:
loaded: ['claude_md', 'current_task', 'recent_tool_results', 'session_history']
offloaded: ['deploy_skill']
load_pct: 92
compact_targets: ['session_history', 'recent_tool_results']
One last thing before we move on. Same surface as a write step — but the lesson doesn't complete until this passes.
Final context-engineering drill. Write manage_session(items, budget, threshold_pct)
that combines budget-planning with a compaction trigger.
Returns a dict with FOUR fields:
loaded: list of item names that fit in the budget (priority-desc, then name-asc; greedy fill)offloaded: list of item names that didn't fit (same sort order)load_pct: int 0-100, percentage of budget used (rounded to nearest,round(100 * used / budget))compact_targets: list of up to TWO item names — the LOWEST priority items currently inloaded. Only populated ifload_pct > threshold_pct; otherwise empty list. Order: priority ascending, then name ascending.
Five items, 4000-token budget, 75% threshold. Expected output:
loaded: ['claude_md', 'current_task', 'recent_tool_results', 'session_history']
offloaded: ['deploy_skill']
load_pct: 92
compact_targets: ['session_history', 'recent_tool_results']
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