Add search-based skills: recall, replay, teach (#12)

• search based skills

• Fix README merge conflicts and harden new skills

Resolve leftover merge markers in README and drop the code-tour block since that skill does not exist in this branch. Add shell-injection guardrails to recall, teach, and replay so user-supplied query text is passed as a single shell-quoted argument with metacharacters escaped. Remove stale code-tour cross-references from teach and replay.

Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com Entire-Checkpoint: eb8f0a35904e

• Use valid --date values and fix replay auth message

The entire CLI's --date flag only accepts week or month. Replace 90d/180d invocations with month, drop the 365d broaden step in favor of removing the filter entirely, and update the corresponding 90/180-day prose in guardrails and the README.

Also correct the replay skill's auth-required message, which referenced a non-existent entire replay subcommand instead of the actual gated command.

Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com Entire-Checkpoint: d4bd1152e387

• Resolve replay step 4 vs step 5 contradiction

Step 4 told the agent to drop checkpoints whose transcripts cannot be read in step 5, but step 5 reads transcripts lazily one step at a time. Defer the unreadable-transcript handling to the existing inline skip rule in step 7's failure modes instead of asking step 4 to pre-fetch.

Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com Entire-Checkpoint: ee2544bd04c4

• Document recall, teach, replay, and session-to-skill in README

Co-Authored-By: Claude Opus 4.7 noreply@anthropic.com Entire-Checkpoint: 3e35bf851747

• Revert README docs for recall, teach, replay, session-to-skill

These skills aren't ready to announce yet. Keep the skill definitions on the branch but pull them out of the public README.

Co-Authored-By: Claude Opus 4.8 (1M context) noreply@anthropic.com Entire-Checkpoint: 55a99ce63877

• chore: bump version to 0.6.0

Adds the recall, teach, and replay skills.

Co-Authored-By: Claude Opus 4.8 (1M context) noreply@anthropic.com Entire-Checkpoint: 31a1d14a1bd2

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