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 j4flmao/agent-skills --skill bulk-importgit clone --depth 1 https://github.com/j4flmao/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/j4flmao/agent-skills/bulk-import)<a href="https://agentmods.dev/skills/j4flmao/agent-skills/bulk-import"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/bulk-import/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/j4flmao/agent-skills/bulk-import"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/bulk-import.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00055 | $0.05300 |
| Opus 5 | $0.00028 | $0.02650 |
| Sonnet 5 | $0.00011 | $0.01060 |
| Haiku 4.5 | $0.00006 | $0.00530 |
Grade A, and why
backend-bulk-import scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
await fetch(job.webhookUrl, { How it starts
The opening of the file, as written. The whole thing — 626 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Bulk Import Skill
Purpose
Design robust bulk import systems that handle large CSV/Excel files with validation, progress tracking, error recovery, and audit trails.
Architecture Decision Trees
Import Mode Selection
| Criterion | Insert | Upsert | Replace |
|---|---|---|---|
| Duplicate handling | Fails on conflict | Updates existing | Truncate all first |
| Performance | Fastest | Moderate (check per row) | Fast (truncate + insert) |
| Idempotent | No | Yes (by dedup field) | No (destructive) |
| Risk level | Low | Low | High (data loss) |
| Audit trail | All inserts | Updates logged | Lost on truncate |
| Rollback complexity | Simple (transaction) | Moderate | Complex (needs backup) |
| Use case | New data ingestion | Sync with external system | Full reimport/replace |
Decision: Upsert for production syncs. Insert for immutable audit data. Replace only with pre-import backup.
Parsing Strategy
| Criterion | Streaming (CSV) | Full load (Excel) | Hybrid (chunked) |
|---|---|---|---|
| Memory | O(1) rows in memory | Full file in memory | O(batch size) |
| Max file size | Unlimited | ~100MB practical | ~500MB |
| Row validation | Per-batch | All before processing | Per-batch |
| Error collection | Per-batch | Full before process | Per-batch |
| Progress tracking | Yes (real-time) | No (must parse first) | Yes (per chunk) |
| Random access | No | Yes | No |
Decision: Streaming for CSV. Chunked for Excel > 10MB. Full load for Excel < 10MB.
Deduplication Strategy
| Approach | Precision | Performance | Implementation |
|---|---|---|---|
| DB unique constraint | Exact | Fast (index) | Schema definition |
| Pre-check with SELECT | Exact | Slow on large tables | Query existing values |
| Hash-based (MD5 row hash) | Approximate | Fast | Hash + compare |
| External dedup (Redis set) | High | Very fast | SET + EXISTS check |
Decision: DB unique constraint for exact dedup. Redis Bloom filter for high-volume approximate dedup.
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/bulk-export.md 10 KB
- references/bulk-import-advanced.md 12 KB
- references/bulk-import-fundamentals.md 11 KB
- references/csv-parsing.md 16 KB
- references/import-monitoring.md 11 KB
- references/import-workflow.md 13 KB
- references/rollback-recovery.md 17 KB
- references/validation-pipeline.md 19 KB
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 · 626 lines · 55 tokens per session scan A dbee2f8a952d
backend-bulk-import is a skill published in the GitHub repository j4flmao/agent-skills (22 stars, last pushed 2d ago), licensed MIT. It adds 55 tokens to every session and 5,300 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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