# SkillOS reference workflow proof

**Workflow:** Sales follow-up email from call notes

This proof shows one economically useful workflow becoming cheaper, faster, and better as SkillOS converts completed jobs into tested skill releases.

## Result

- Proved: **True**
- Final skill version: **v6**
- Quality gain vs initial agent: **+0.46**
- Speed gain vs initial agent: **62% faster**
- Cost reduction vs initial agent: **62% cheaper**
- Cost reduction vs human baseline: **78% cheaper**
- Projected savings at 10,000 jobs/year vs human baseline: **$117,700**

## Before vs After

| Metric | Initial Agent | Final SkillOS |
|---|---:|---:|
| Quality score | 0.5 | 0.96 |
| Accepted rate | 67% | 96% |
| Minutes per job | 6.75 | 2.55 |
| Cost per job | $8.48 | $3.23 |

## Monotonic checks

- every job created approved release: **True**
- cost per job decreased after each release: **True**
- minutes per job decreased after each release: **True**
- quality score increased after each release: **True**
- accepted rate increased after each release: **True**

## Releases
- Job 1: released **sales_followup_email v2** — Put the agreed next step in the first three lines. → quality 0.64, 5.44 min/job, $6.84/job.
- Job 2: released **sales_followup_email v3** — Mention the buyer's specific pain point instead of generic value language. → quality 0.74, 4.53 min/job, $5.71/job.
- Job 3: released **sales_followup_email v4** — End with one concrete yes/no call to action. → quality 0.83, 3.77 min/job, $4.76/job.
- Job 4: released **sales_followup_email v5** — Keep the email under 120 words unless the user asks for detail. → quality 0.94, 3.06 min/job, $3.87/job.
- Job 5: released **sales_followup_email v6** — Do not invent commitments, dates, metrics, or attachments that are not present in the notes. → quality 0.96, 2.55 min/job, $3.23/job.
