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 rse/ase --skill ase-meta-compatgit clone --depth 1 https://github.com/rse/aseWrote 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/rse/ase/ase-meta-compat)<a href="https://agentmods.dev/skills/rse/ase/ase-meta-compat"><img src="https://agentmods.dev/badge/skills/rse/ase/ase-meta-compat.svg" alt="Measured on agentmods" 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 | $0.00071 | $0.03434 |
| Opus 5 | $0.00036 | $0.01717 |
| Sonnet 5 | $0.00014 | $0.00687 |
| Haiku 4.5 | $0.00007 | $0.00343 |
Grade A, and why
ase-meta-compat scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 288 lines — stays where its author put it; the contents beside it link to each section on GitHub.
@${CLAUDE_SKILL_DIR}/../../meta/ase-control.md
If $1 (the first token of the skill arguments) is equal to -h or
--help, you MUST once output the following output and
then IMMEDIATELY STOP the further skill processing:
Self-Test ASE Compatibility
Objective
Self-test how faithfully the current LLM (and its harness) executes the four core interpreter primitives that every ASE skill silently relies on -- control flow, XML placeholders, regex matching, and arithmetic -- and report an overall 0%…100% compatibility rating.
This skill is unusual: it is both the test definition and the system under test. Each probe is a pure ASE construct that you execute, recording its actual result. You MUST NOT compare against any expected value until STEP 6. Do not fabricate passes: a probe whose actual result differs from its expected result MUST be recorded as a fail.
Notice that this skill intentionally does not strictly follow the ASE skill format; in particular, it does not include the usual meta skill information.
Procedure
-
STEP 1: Initialize Self-Test
Initialize the running map of actual probe results (set to empty) -- every probe in STEPs 2-5 stores its result here as a
<category/>/<probe-name/>entry with its actual computed value.Initialize the running list of failed probes (set to empty) -- this is populated only in STEP 6 after comparing actuals against the expected values.
-
STEP 2: Probe XML Placeholders
Execute all of the following XML-placeholder probes (in the given order). For each probe, record the actual result in under the key
xml-placeholders/<probe-name/>. Do not compare to any expected value here.-
get-and-set: Set 42, then get . Record actual result for
xml-placeholders/get-and-set. -
self-ref: Set 42, then set
<v>pre_<v/></v>, then get . Record actual result forxml-placeholders/self-ref. -
overwrite: Set 42, then set
<v>99</v>, then get . Record actual result forxml-placeholders/overwrite. -
indexed: Set
<eval-1-2>+1</eval-1-2>and<eval-2-1>-1</eval-2-1>, then get and via<eval-1-2/>,<eval-2-1/>. Record actual result forxml-placeholders/indexed. -
nested-attr: With 20, build the value of an XML attribute
width="<w/>"and read the attributewidthback. Record actual result forxml-placeholders/nested-attr. -
entity: Evaluate the XML entity
⦿and get the rendered Unicode character. Record actual result forxml-placeholders/entity.
Set to the number of XML-placeholder probes above.
-
-
STEP 3: Probe Control Flow
Execute all of the following control-flow probes (in the given order). For each probe, record the actual result in under the key
control-flow/<probe-name/>. Do not compare to any expected value here.-
branch: Set 3, then evaluate
<if condition="<a/> is greater than 5">big</if> <elseif condition="<a/> is greater than 2">mid</elseif> <else>small</else>. Record actual result forcontrol-flow/branch. -
while-sum: Set 0 and 1, then evaluate
<while condition="<i/> is less than or equal to 5"> set <s/> to <s/> + <i/>, set <i/> to <i/> + 1 </while>. Record as actual result forcontrol-flow/while-sum. -
for-order: Set , then evaluate
<for items="x y z"><s><s/>-<item/></s></for>. Record as actual result forcontrol-flow/for-order. -
while-break: Set 1 and , then evaluate
<while condition="<i/> is less than or equal to 9"> if <i/> equals 4 set <hit/> to <i/> and <break/>, else set <i/> to <i/> + 1 </while>. Record as actual result forcontrol-flow/while-break.
-
What ships with it
1 file 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.
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.
- 8d ago First seen · 288 lines · 71 tokens per session scan A 65d7d31367ba
ase-meta-compat is a skill published in the GitHub repository rse/ase (47 stars, last pushed today), licensed Apache-2.0. It adds 71 tokens to every session and 3,434 once invoked, about $0.0004 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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