Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add BuilderCed/agent-skills --skill fr-fec-generatorgit clone --depth 1 https://github.com/BuilderCed/agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/builderced/agent-skills/fr-fec-generator)<a href="https://agentmods.dev/skills/builderced/agent-skills/fr-fec-generator"><img src="https://agentmods.dev/badge/skills/builderced/agent-skills/fr-fec-generator/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/builderced/agent-skills/fr-fec-generator"><img src="https://agentmods.dev/badge/skills/builderced/agent-skills/fr-fec-generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00042 | $0.01436 |
| Opus 5 | $0.00021 | $0.00718 |
| Sonnet 5 | $0.00008 | $0.00287 |
| Haiku 4.5 | $0.00004 | $0.00144 |
Grade A, and why
fr-fec-generator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FEC Generator (Fichier des Ecritures Comptables)
AVERTISSEMENT : Ce skill aide a la preparation. La validation finale doit etre faite par un expert-comptable. Amende de 5 000 EUR en cas de non-conformite.
Quand Utiliser
- Generer un fichier FEC a partir de donnees comptables
- Valider un FEC existant avant transmission a la DGFIP
- Comprendre les 18 champs obligatoires
- Corriger les erreurs courantes de format
Specification du Format
- Extension :
.txt - Encodage : UTF-8
- Delimiteur : Tabulation
\tou pipe|(coherent dans tout le fichier) - Nom de fichier :
{SIREN}FEC{AAAAMMJJ}.txt(ex: 123456789FEC20251231.txt) - Separateur decimal : Point
.ou virgule,(coherent dans tout le fichier) - Couverture : Toutes les ecritures d'un exercice fiscal complet
Les 18 Champs Obligatoires
| # | Champ | Description | Format |
|---|---|---|---|
| 1 | JournalCode | Code du journal | Texte (ex: "VE", "AC", "BQ") |
| 2 | JournalLib | Libelle du journal | Texte (ex: "Ventes", "Achats") |
| 3 | EcritureNum | Numero de l'ecriture | Texte, unique et croissant |
| 4 | EcritureDate | Date de l'ecriture | AAAAMMJJ |
| 5 | CompteNum | Numero de compte PCG | Texte (3 a 12 chiffres) |
| 6 | CompteLib | Libelle du compte | Texte |
| 7 | CompAuxNum | Compte auxiliaire | Texte (ou vide) |
| 8 | CompAuxLib | Libelle auxiliaire | Texte (ou vide) |
| 9 | PieceRef | Reference de la piece | Texte |
| 10 | PieceDate | Date de la piece | AAAAMMJJ |
| 11 | EcritureLib | Libelle de l'ecriture | Texte |
| 12 | Debit | Montant au debit | Numerique (0.00 si vide) |
| 13 | Credit | Montant au credit | Numerique (0.00 si vide) |
| 14 | EcrtureLettrage | Lettrage | Texte (ou vide) |
| 15 | DateLettrage | Date de lettrage | AAAAMMJJ (ou vide) |
| 16 | ValidDate | Date de validation | AAAAMMJJ |
| 17 | Montantdevise | Montant en devise | Numerique (ou vide) |
| 18 | Idevise | Identifiant devise | Texte ISO 4217 (ou vide) |
Regles de Validation
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 107 lines · 42 tokens per session scan A 0d8a47dd68da
fr-fec-generator is a skill published in the GitHub repository BuilderCed/agent-skills (2 stars, last pushed 4mo ago), licensed MIT. It adds 42 tokens to every session and 1,436 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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