fix: randomly select starting item on cache miss in round-robin workflows

[Copilot]

Workflows using cache-memory for round-robin rotation always started from a fixed position on a cold start, causing repeated cache misses (after expiry or first run) to process the same items first every time.

Changes

• daily-function-namer.md — Python snippet now returns -1 as a sentinel when the cache is absent/unreadable; after TOTAL is computed, -1 resolves to $(( RANDOM % TOTAL )). Added an early exit guard for TOTAL=0.

  # Before
  print(d.get('last_package_index', 0))  # always index 0 on miss
  
  # After
  print(d.get('last_package_index', -1))  # -1 = "pick randomly"
  # …then, after TOTAL is known:
  if [ "$LAST_INDEX" -eq -1 ]; then
    LAST_INDEX=$(( RANDOM % TOTAL ))
  fi

• daily-caveman-optimizer.md — Updated instruction to use $(( RANDOM % TOTAL )) for the initial index on a cold start instead of hardcoding 0.

• slide-deck-maintainer.md — Cold-start category selection now uses shuf -n1 -e source-code agentic-workflows documentation instead of always defaulting to documentation.

[Copilot]

Pull request overview

Adjusts round-robin cold-start behavior for workflows that rely on cache-memory so that cache misses don’t always start at a fixed position (reducing repeated cache-miss churn on the same initial items).

Changes:

• Update daily-function-namer package selection script to treat cache miss/unreadable state as a sentinel and randomize the initial index (plus add a TOTAL=0 guard).
• Update daily-caveman-optimizer instructions to randomize the initial index on cold start.
• Update slide-deck-maintainer instructions to randomize the initial category on cold start.

Show a summary per file

File	Description
.github/workflows/slide-deck-maintainer.md	Documents randomized category selection on cold cache for round-robin scanning.
.github/workflows/daily-function-namer.md	Implements cache-miss sentinel + random start index in the selection script and adds an empty-package guard.
.github/workflows/daily-caveman-optimizer.md	Documents random start index selection for cold-cache runs.

Copilot's findings

Tip

Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

• Files reviewed: 3/3 changed files
• Comments generated: 3