Borrowing it
Nothing to install: this file belongs to notactuallytreyanastasio/deciduous. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/notactuallytreyanastasio/deciduous/main/.opencode/skills/archaeology/SKILL.mdgit clone --depth 1 https://github.com/notactuallytreyanastasio/deciduousWrote 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/notactuallytreyanastasio/deciduous/archaeology)<a href="https://agentmods.dev/skills/notactuallytreyanastasio/deciduous/archaeology"><img src="https://agentmods.dev/badge/skills/notactuallytreyanastasio/deciduous/archaeology/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/notactuallytreyanastasio/deciduous/archaeology"><img src="https://agentmods.dev/badge/skills/notactuallytreyanastasio/deciduous/archaeology.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 | $0.00012 | $0.00686 |
| Opus 5 | $0.00006 | $0.00343 |
| Sonnet 5 | $0.00002 | $0.00137 |
| Haiku 4.5 | $0.00001 | $0.00069 |
Grade A, and why
archaeology 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 — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Archaeology
Transform narratives into a queryable decision graph.
Run /narratives first to create .deciduous/narratives.md.
Step 1: Read the narratives
deciduous narratives show
For each narrative, you'll create a subgraph.
Step 2: Create root goals
For each narrative, create a backdated goal:
deciduous add goal "<Narrative title>" -c 90 --date "YYYY-MM-DD"
Step 3: Build initial approaches
deciduous add decision "<First approach>" -c 85 --date "YYYY-MM-DD"
deciduous link <goal> <decision> -r "Initial design"
Step 4: Create pivots with archaeology pivot
For each PIVOT in a narrative, use the atomic pivot command:
deciduous archaeology pivot <from_id> "<what was learned>" "<new approach>" -c 85 -r "<why it failed>"
This automatically creates:
- observation node (what was learned)
- revisit node (reconsidering the old approach)
- decision node (the new approach)
- All 3 linking edges
- Marks the old approach as superseded
Preview before executing:
deciduous archaeology pivot <from_id> "observation" "new approach" --dry-run
Step 5: Connect narratives
When narratives reference each other:
deciduous link <auth_observation> <ratelimit_decision> \
-r "Auth failures drove rate limit redesign"
Step 6: Mark superseded paths
For nodes that were replaced but not part of a pivot:
# Single node
deciduous archaeology supersede <id>
# Node and all descendants
deciduous archaeology supersede <id> --cascade
Step 7: Review the timeline
# See all nodes chronologically
deciduous archaeology timeline
# Filter by type
deciduous archaeology timeline --type revisit
# See existing pivot chains
deciduous narratives pivots
# Visual exploration
deciduous serve
Attach Evidence Documents
If you find diagrams, screenshots, or specs that support the archaeology:
deciduous doc attach <goal_id> evidence/old-architecture.png -d "Architecture before refactor"
deciduous doc attach <revisit_id> evidence/perf-report.pdf --ai-describe
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 · 125 lines · 12 tokens per session scan A 8c1dcefbf38e
archaeology is a skill published in the GitHub repository notactuallytreyanastasio/deciduous (159 stars, last pushed 4d ago), licensed Apache-2.0. It adds 12 tokens to every session and 686 once invoked, about $0.0001 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 2026-08-30.
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