references/context-safety.md

skills/diagnosing-superpowers/references/context-safety.md · 990 B · View on GitHub at 22f0b46

Context safety for session transcripts

One transcript record can exceed a megabyte or embed a whole history. Printing one whole record can overflow the context of the session doing the diagnosis. Every reader of a session file, controller or subagent, follows these rules for every file, every time.

1. Measure before reading.

   wc -lc "$F"
   awk '{ if (length($0) > 100000) print NR, length($0) }' "$F"   # long lines

2. Never cat or grep for content. Get line numbers and counts first (grep -n … | cut -d: -f1, jq -r '.type' | sort | uniq -c), then small fields from specific lines (sed -n Np | jq -c '{…}' or | cut -c1-500). Use the field-extraction commands established during discovery for the source in front of you.

3. Narrow anything over 500 characters. If a command returns more than 500 characters for one record, tighten the field or the slice.

4. Read-only. Never modify, move, or delete a session file.

Original Markdown source

references/context-safety.md

# Context safety for session transcripts

One transcript record can exceed a megabyte or embed a whole history. Printing
one whole record can overflow the context of the session doing the diagnosis.
Every reader of a session file, controller or subagent, follows these rules for
every file, every time.

1. **Measure before reading.**

   ```bash
   wc -lc "$F"
   awk '{ if (length($0) > 100000) print NR, length($0) }' "$F"   # long lines
   ```

2. **Never `cat` or `grep` for content.** Get line numbers and counts
   first (`grep -n … | cut -d: -f1`, `jq -r '.type' | sort | uniq -c`),
   then small fields from specific lines (`sed -n Np | jq -c '{…}'` or
   `| cut -c1-500`). Use the field-extraction commands established during
   discovery for the source in front of you.
3. **Narrow anything over 500 characters.** If a command returns more than
   500 characters for one record, tighten the field or the slice.
4. **Read-only.** Never modify, move, or delete a session file.