Anthony Cardinale
0728ae6592
- Add assets/before-after.png — Plate i: five real renames laid out as a
typeset table; mulberry highlight on the description segment; visual
callouts for the U+202F gap and the user-keyword preservation case
- Add assets/session.png — Plate ii: editorial paper frame around an
ink-dark Claude Code session card showing user prompt, claude
orchestration, parallel Haiku fan-out across ten batches, and the run
receipt
- Keep the source HTMLs (assets/{before-after,session}.html) so the
plates can be regenerated via headless Brave at 1600x1100
- README.md rewritten: centered hero with embedded plate i, dedicated
"A session, end to end" section embedding plate ii, new highlights
(multi-prefix, idempotent), new "What the parser accepts" table,
gotchas extended to 13, real-world impact promoted to a 3-row table
- docs/index.html surgically extended (existing editorial CSS preserved):
new .plate and .additions components, nav gets what's-new and session
links, new section 04 "What's new" with three additions cards plus a
run-iii receipt, original receipt relabeled run-ii, gotchas list
extended with #11-13, new section 07 "The session" embedding plate ii,
install renumbered to 08
- Image refs in docs/index.html use absolute gitea raw URLs so they
resolve when served from gitea pages or viewed locally
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
129 lines
6.7 KiB
Markdown
129 lines
6.7 KiB
Markdown
<div align="center">
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# screenshot-rename
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*A Claude Code skill that turns a folder of timestamp-named screenshots*<br>
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*into a folder of human-readable, searchable filenames —*<br>
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*using parallel Haiku vision agents.*
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[**Homepage**](https://pages.tojo.team/cardinale/screenshot-rename/) · [SKILL.md](SKILL.md) · [pipeline.py](pipeline.py) · [MIT](LICENSE)
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<br>
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<img src="assets/before-after.png" alt="Before / after — five real renames, including U+202F handling and user-keyword preservation" width="900">
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</div>
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<br>
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```
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CleanShot 2026-04-15 at 09.14.07.png
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↓
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CleanShot - Shamel Studio Affiliate Referral Code Modal - 2026-04-15 at 09.14.07.png
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```
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Built for [CleanShot](https://cleanshot.com)-style screenshot folders, but works on any directory of `.png` / `.gif` / `.mp4` / `.pdf` files named only by timestamp. Recognizes both **`CleanShot ...`** and Apple **`Screenshot ...`** filenames in the same pass, preserves any leading user-typed keyword prefix, and is safe to re-run on a folder that's already partially renamed.
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## Highlights
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- **Parallel** — describes ~200 files in 3 minutes using 10 concurrent Haiku subagents.
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- **Safe** — pre-builds the full rename plan in memory, validates uniqueness and target collisions, then renames atomically with a file-count audit. Designed after losing 4 files to a `mv` overwrite during prototyping.
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- **Multi-prefix** — same pipeline handles `CleanShot ...`, Apple `Screenshot ...`, and files with hand-typed leading keywords (e.g. `jojo travel CleanShot ...`).
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- **Idempotent** — re-running on a folder skips files already in the renamed `App - Description - timestamp.ext` form. No description-stacking.
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- **Handles video / PDF** — extracts the first frame so vision agents can describe them.
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- **Resizes for the vision tool** — Retina screenshots exceed Read's image cap; pipeline downsamples to 1568 px max.
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## A session, end to end
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<div align="center">
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<img src="assets/session.png" alt="Claude Code session — user prompt, parallel Haiku fan-out across ten batches, receipt of the run" width="900">
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</div>
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The skill activates when you ask Claude conversationally. Behind the scenes it preps the folder, fans out ten Haiku agents in a single round-trip, validates the resulting plan, then applies the renames in a single Python pass with a file-count audit at the end.
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## Installation
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This is a Claude Code skill. Drop the repo into `~/.claude/skills/`:
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```bash
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git clone https://gitea.tojo.team/cardinale/screenshot-rename.git \
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~/.claude/skills/screenshot-rename
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```
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In your next Claude Code session, ask:
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> rename all the cleanshot files in `~/Documents/Screenshots/` based on their content
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The skill will activate automatically from its description.
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## Usage from the command line
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You can also drive the pipeline directly:
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```bash
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# 1. Prep — extract frames, resize, build batches
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python3 pipeline.py prep --src "/path/to/folder" --batch-size 19
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# 2. (In a Claude Code session, dispatch one Haiku subagent per
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# /tmp/screenshot-rename/full-batch-NN file using the prompt template
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# in SKILL.md.)
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# 3. Plan — aggregate descriptions, validate, build rename map
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python3 pipeline.py plan --src "/path/to/folder"
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# 4. Execute — apply the plan, audit file count
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python3 pipeline.py execute --src "/path/to/folder"
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```
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The dispatch step (#2) currently requires a Claude Code session.
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## What the parser accepts
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| Form | Recognized | Becomes |
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|---|---|---|
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| `CleanShot 2026-MM-DD at HH.MM.SS.png` | yes | `CleanShot - <description> - 2026-MM-DD at HH.MM.SS.png` |
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| `Screenshot 2026-MM-DD at H.MM.SS PM.png` (with U+202F) | yes — U+202F normalized to ASCII space | `Screenshot - <description> - 2026-MM-DD at H.MM.SS PM.png` |
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| `<keywords> CleanShot 2026-MM-DD at HH.MM.SS.png` | yes — keywords title-cased and prepended to the AI description | `CleanShot - <Keywords + description> - 2026-MM-DD at HH.MM.SS.png` |
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| `App - <description> - 2026-MM-DD at HH.MM.SS.png` | already renamed → **skipped** | (unchanged) |
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## The gotchas this skill encodes
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This skill exists because every one of these caused real damage during development:
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1. The `Read` tool has an image-size cap. Resize first.
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2. Vision can't read `.mp4` or multi-page `.pdf` directly. Extract a frame.
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3. **Bash regex `[[ =~ ]]` does NOT populate `BASH_REMATCH` in zsh.** Targets become empty. Loops collide on the same filename. Files vanish. Use Python for any filename mutation.
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4. `mv` silently overwrites. Use `mv -n` or `os.rename` with explicit pre-existence check.
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5. Pre-build the entire rename plan in memory and validate uniqueness before any `mv`.
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6. Audit `len(os.listdir(DEST))` before and after. Equal count == proof no overwrites.
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7. iCloud-synced files in Time Machine local snapshots are file-provider stubs, not bytes. External backups (Backblaze, Time Machine to physical disk) are the real recovery source.
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8. `Bash run_in_background` may exit early on `while read` loops. Run renames foreground via Python.
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9. Haiku occasionally returns the resized `.jpg` filename instead of the original `.png`. Validator must try alt extensions.
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10. Always preserve the original `.mp4` / `.pdf` extension — describe via the extracted frame, rename the source.
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11. **macOS `Screenshot` filenames contain U+202F (NARROW NO-BREAK SPACE)** before AM/PM. Haiku echoes it as ASCII space, so a verbatim filename lookup misses every Screenshot file. Normalize on both sides of the lookup; emit ASCII space in the new name.
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12. **Re-running is only safe if the parser skips already-renamed files.** Detect `^App - .+ - timestamp.ext$` and exclude.
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13. **Leading user-typed keyword prefix is signal, not noise.** Title-case the keywords and prepend them to the AI description before assembling the new name.
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The full discussion is in [SKILL.md](SKILL.md#the-critical-gotchas-every-one-of-these-caused-real-pain).
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## Real-world impact
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| Run | Files | What happened |
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|---|---|---|
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| 1 | 196 CleanShot | Lost 4 to the bash-regex-in-zsh gotcha (#3). |
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| 2 | 196 CleanShot | Rebuilt with Python and `mv -n` — 189 renamed cleanly, zero loss. |
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| 3 | 20 mixed (CleanShot + Apple Screenshot + one user-prefixed) | First plan attempt dropped every Screenshot file with a misleading `NO_DESC` error. Diagnosed the U+202F gotcha (#11) via `repr()` of the live filename. After adding U+202F normalization, multi-prefix support, and keyword preservation — all 20 renamed in one pass. |
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## Roadmap
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- Direct Anthropic API mode (no Claude Code session required) — needs `ANTHROPIC_API_KEY`
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- Custom prompt templates per-folder
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- Optional preservation of dots in technical strings (`v2.1` currently becomes `V21`)
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- Dry-run flag on `execute`
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## License
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MIT — see [LICENSE](LICENSE).
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