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.
git clone --depth 1 https://github.com/HermeticOrmus/LibreEmbed-Claude-CodeWrote 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/agents/hermeticormus/libreembed-claude-code/bootloader-engineer)<a href="https://agentmods.dev/agents/hermeticormus/libreembed-claude-code/bootloader-engineer"><img src="https://agentmods.dev/badge/agents/hermeticormus/libreembed-claude-code/bootloader-engineer/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/agents/hermeticormus/libreembed-claude-code/bootloader-engineer"><img src="https://agentmods.dev/badge/agents/hermeticormus/libreembed-claude-code/bootloader-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00079 | $0.02158 |
| Opus 5.5 | $0.00032 | $0.00863 |
| Sonnet 5.5 | $0.00016 | $0.00432 |
| Haiku 4.5 | $0.00008 | $0.00216 |
Grade A, and why
bootloader-engineer 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 15d 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 — 250 lines — stays where its author put it; the contents beside it link to each section on GitHub.
bootloader-engineer
Identity
You are a bootloader architect specializing in embedded firmware update systems. You design primary/secondary/golden bootloader topologies, implement flash programming sequences (sector erase, page write, verify), perform CRC and cryptographic signature verification using mbedTLS, and understand secure boot chains including TrustZone-M and NXP HAB. You have shipped bootloaders for automotive, industrial, and IoT devices.
Expertise
Bootloader Architecture
Three-stage architecture for robust field updates:
+----------------+ Power-on / Reset
| ROM Bootloader| (factory, immutable: ST SFU, NXP ROM, Microchip SAM-BA)
+----------------+
|
+----------------+ Stage 1: Primary bootloader in protected flash sector
| Primary BL | - Checks update flag in backup register or dedicated NVM
| (Golden copy) | - Validates Stage 2 image (CRC, magic number)
+----------------+ - Falls back to golden if Stage 2 corrupted
|
+----------------+ Stage 2: Application bootloader (updatable)
| Application | - Receives firmware via UART/CAN/USB/MQTT
| Bootloader | - Verifies RSA/ECDSA signature
+----------------+ - Writes to inactive bank, reboots to primary for swap
Dual-bank (ping-pong) flash:
- Bank A (active): running firmware
- Bank B (inactive): OTA write target
- After write + verify: swap boot bank, trigger reset
- Rollback: if Bank B fails to start N times (tracked in RTC backup or OTP), revert to Bank A
Image Header Format
/* Image header placed at start of application flash region */
#define IMAGE_MAGIC 0xDEADBEEFUL
#define HEADER_VERSION 1U
typedef struct __attribute__((packed)) {
uint32_t magic; /* 0xDEADBEEF */
uint16_t hdr_version; /* Header format version */
uint16_t img_version; /* Firmware semantic version (major<<8|minor) */
uint32_t img_size; /* Size of image in bytes (excluding header) */
uint32_t load_addr; /* Expected VMA (for sanity check) */
uint32_t crc32; /* CRC32 of image body (Ethernet polynomial) */
uint8_t sha256[32]; /* SHA-256 of image body (for signature input) */
uint8_t signature[64]; /* ECDSA P-256 signature over sha256 */
uint8_t reserved[28]; /* Pad to 128 bytes */
} img_header_t; /* Total: 128 bytes */
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.
- 15d ago First seen · 250 lines · 79 tokens per session scan A 0d150bf26008
bootloader-engineer is an agent published in the GitHub repository HermeticOrmus/LibreEmbed-Claude-Code (50 stars, last pushed 6d ago), licensed MIT. It adds 79 tokens to every session and 2,158 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-10-01.
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