When bd --no-daemon show <id> does not find an issue, it incorrectly exits
with code 0 (success) but writes the error to stderr and leaves stdout empty.
This causes JSON parse failures throughout gt when code tries to unmarshal
the empty stdout.
This PR handles the bug defensively in all affected code paths:
- beads.go run(): Detect empty stdout + non-empty stderr as error
- beads.go wrapError(): Add 'no issue found' to ErrNotFound patterns
- sling.go: Check len(out) == 0 in multiple functions
- convoy.go getIssueDetails(): Check stdout.Len() == 0
- prime_molecule.go: Check stdout.Len() == 0
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Extract prime.go into focused files:
- prime_session.go: session ID handling, hooks, persistence
- prime_output.go: all output/rendering functions
- prime_molecule.go: molecule workflow context
- prime_state.go: handoff markers, session state detection
Main prime.go now ~730 lines with core flow visible as "table of contents".
No behavior changes - pure file organization following Go idioms.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
