Public craft-metrics report
The Real Data Behind SongForgeAI
Every song forged by the pipeline logs its composite score, prosody warnings, detail balance, emotional arc shape, and fire-line peaks into forge_metrics. This page is the aggregate — updated hourly, suppressed below 30-sample cells, no user-identifying data.
Report generated Fri, 06 Nov 2026 23:14:17 GMT. Window: 5/5/2026 to 10/10/2026.
Corpus summary
Songs forged
1,000
Avg composite
80.9
Median composite
83.0
Arc variety
98% non-flat
Composite score distribution
0-49
0.2%
50-59
0.1%
60-69
1%
70-79
36.8%
80-89
61.6%
90+
0.3%
Emotional arc shape distribution
flat
2%
single-axis
61.9%
shaped
35.4%
volatile
0.7%
By genre
Each slice shows at least 30 songs. Genres below that floor are suppressed to protect small-cell identity.
| Genre | Songs | Avg composite | Prosody/song | Fire-line peak |
|---|---|---|---|---|
| folk | 168 | 83.1 | 7.06 | 64.2 |
| alternative | 108 | 79.8 | 6.63 | 62.6 |
| indie | 66 | 82.4 | 6.94 | 63.3 |
| pop | 61 | 77.3 | 9.10 | 64.1 |
| contemporary | 60 | 82.2 | 6.12 | 64.1 |
| 1990s | 53 | 82.1 | 7.36 | 61.6 |
| christian | 42 | 79.1 | 7.26 | 63.5 |
| worship | 36 | 77.1 | 8.14 | 65.0 |
| country | 36 | 81.3 | 9.19 | 63.6 |
By quarter
| Period | Songs | Avg composite | Prosody/song | % gauntlet improved | % enriched |
|---|---|---|---|---|---|
| 2026-Q2 | 900 | 81.3 | 6.62 | — | 42.4% |
| 2026-Q3 | 81 | 76.2 | 12.23 | — | 92.6% |
Glossary
- composite score
- 0-100 output of the 12-metric rubric at /scoring/standard. Eight-voice panel with anti-inflation rules (gravity, burden of proof, antagonist ceiling). 50 = the gravity default; 80+ is genuinely strong; 90+ is rare territory.
- prosody warnings
- Count of Pattison-rule violations per song from the deterministic singability scanner. Fewer is better. Catches stress mismatches, weak hook-word placement, vowel-on-low-note-with-cluster, etc.
- arc shape
- Classification of the song’s emotional contour, computed per-section from valence + arousal:
- flat — valence and arousal both sit in a narrow band the whole song. Reads as monotone; usually a wound, not a stylistic choice.
- single-axis — one of valence or arousal moves meaningfully but the other is flat. The song goes dark or goes loud, but not both.
- shaped — both valence and arousal change section to section in a coherent direction (rising, falling, or rising-then-falling). The intended healthy shape.
- volatile — both axes move but the direction is incoherent: a section jumps brighter then darker then brighter again with no accumulating arc. Reads as confused emotional intent.
- fire-line peak
- Highest line-level Ritter memetic score across the lyric. Tries to surface the most quotable / shareable single line.
- % gauntlet improved
- Of songs the gauntlet ran on (mode=‘gauntlet’ rows), fraction whose composite score went UP after the gauntlet rewrite. Build 1183 fix: the prior aggregator counted initial forges in the denominator, biasing this toward 0%. The current number is “of gauntlet attempts, what fraction lifted the score.” Reverted gauntlets aren’t logged to this table at all (separate code path), so they don’t pull this down.
- % enriched
- Fraction of forges that had the SuperPrompt enrichment step run. Caveat: as of Build 1183 only the V2 forge UI sets this flag; the dominant V1 path doesn’t log it even when SuperPrompt fires. So a low number here (e.g. 2%) reflects V2 routing share, NOT how often enrichment actually ran. Tracking under-coverage; will be fixed when V1 logging is wired up or V1 is retired.
- Berklee batch lift
- Composite + prosody comparison before vs after Build 935, when Pattison prosody rules and Stolpe destination-writing priors were pushed directly into the forge + gauntlet system prompts. A positive composite delta + a negative prosody delta is the target.
- arc variety
- The percentage of songs whose arc shape is NOT ‘flat’ (i.e. everything that’s single-axis, shaped, or volatile combined). High = the pipeline is producing songs with motion; low = monotone output.
Methodology + disclosure
- All data sourced from the
forge_metricstable, populated fire-and-forget after every completed forge. - Any slice below 30 samples is suppressed. No user, song, or lyric identifiers are included in this report.
- This report is updated hourly via ISR. Refresh to pull the latest snapshot. The open rubric is at /scoring/standard.