sendmux-token-efficient-usage SKILL.md skillA
sendmux-token-efficient-usage from sendmux/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sendmux/skills/sendmux-token-efficient-usage@v1.0Pins v1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sendmux/skills
- Path
plugins/sendmux/skills/sendmux-token-efficient-usage/SKILL.md- Versions recorded
- 5
- Latest version
- v1.0, committed Sep 15, 2026
- First version recorded
- Sep 1, 2026
- Size
- 17,968 bytes
- Repository stars
- 18
- License
- a license file GitHub does not identify
Use when the question is about *how to call* Sendmux cheaply, not what to send: choosing batch vs. looped sends, mailbox search/count/batch-read vs. full fetches, sync deltas, cursor pagination, ETags/conditional requests, idempotency keys, or picking between MCP, the sendmux CLI, an SDK, or direct HTTP. Trigger for reducing token/round-trip/API-call cost, avoiding broad mailbox or log fetches, or optimising a polling/sync loop.\n\nThis is a routing/cost-decision skill, never a…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Sendmux token-efficient usage Use this skill to choose the lowest-cost Sendmux route that still answers the task correctly. ## Boundaries - Do not ask the user to paste an API key. - For API-key authentication, use `smx_mbx_*` keys for normal Mailbox calls. - For a self-registered agent, reuse one durable CLI profile. Mailbox reads become available after provisioning, before owner approval; Sending stays blocked until owner approval. - For API-key authentication, use `smx_root_*` for Management calls. - Do not default to MCP for every task. MCP is best when the required tool is curated; CLI and SDK cover broader surfaces. - Keep real attachment bytes outside model context and route their mechanics to `sendmux-attachments`; use the attachment route reference below. - Do not read full mailbox bodies, every message, or every log row unless the user asks for full content and narrower calls cannot answer. …
Read the whole file at its exact version.
How to install
mdr add sendmux/skills/sendmux-token-efficient-usage@sha256:dc71d5b01735a0a1The line at the top of this page pins the label v1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_gjllp4ssc6puib2c)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 1, 2026 and Sep 15, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0 latest | 2026-09-15 | 1ac1ffc | 17,968 B | A | view · diff |
| v1.0 | 2026-09-15 | 3de00a3 | 17,968 B | A | view · diff |
| v1.0 | 2026-09-11 | 4b98e93 | 10,990 B | A | view · diff |
| v1.0 | 2026-09-01 | dba9ca4 | 10,532 B | A | view · diff |
| v1.0 | 2026-09-01 | fb0f3a5 | 10,500 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (17968 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
sendmux/skills · 18 stars · license a license file GitHub does not identify · pushed 2026-10-15 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_gjllp4ssc6puib2c GET https://markdownregistry.com/api/v1/resolve?ref=sendmux/skills/sendmux-token-efficient-usage GET https://markdownregistry.com/api/v1/blob/dc71d5b01735a0a1c4f6d9577c719f8302f5411a66ea173e50db2c2091ed8458
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.