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Apply the no-ai-slop standard (now binding in AGENTS.md): the em-dash character is banned outright (restructured, not blind-replaced), plus the banned word/phrase list (delve, leverage, robust, seamless, truly, unlock, etc.). 0 em-dashes remain in modules + capstone; the only "robust" left is the planted M10 ai-change.patch trap. Module H1 titles use a colon separator. All deliberate teaching devices preserved; labs compile/parse (py/sh/yaml/json); no junk. AGENTS.md updated with the hard no-slop rules. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01TfzV5QvtPDz8LJS3Pu5VLT
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Title: Add a clear-done command to remove completed tasks
Body:
What
Add a clear-done command to the tasks CLI that removes every task already marked done, leaving
the pending ones untouched.
Why
After working through a list, the completed items pile up as noise. There's currently no way to
clear them out short of editing tasks.json by hand.
Acceptance criteria
python cli.py clear-doneremoves all completed tasks and keeps all pending ones.- It prints how many tasks were removed.
- The removal logic lives in
tasks.py(aTaskListmethod), not incli.py. - Running it when nothing is done is a no-op that removes 0 tasks (no crash).