> For the complete documentation index, see [llms.txt](https://0x29a.gitbook.io/0x29a-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://0x29a.gitbook.io/0x29a-docs/memory-and-analysis/sig.md).

# sig

**analysis · global: `sig`**

Byte-pattern signatures (pattern scanning) — the most common way to locate code that survives game updates.

Patterns use `?` as a byte wildcard (both `"48 8B ? ? 90"` and `"488B????90"` work — spaces are optional).

### `sig.scan(pattern [, module]) -> addr | nil`

Searches for the pattern. Without `module`, scans every loaded module until the first match; with `module` (name, e.g. `"client.dll"`), restricts the search to it.

```lua
local addr = sig.scan("48 8B 05 ? ? ? ? 48 8B 88", "engine.dll")
```

### `sig.scan_all(pattern) -> [addr]`

Like `sig.scan`, but returns **every** match across every module — useful to validate that a pattern is unique before relying on it.

### `sig.create(addr, len) -> pattern`

Automatically generates a signature pattern from the `len` bytes at `addr` (a simple heuristic that wildcards the bytes most likely to vary between builds — offsets, immediates).

```lua
local pat = sig.create(known_addr, 32)
print(pat)
-- sanity check: sig.scan(pat) should come back at known_addr
```

See also the global helper [`mksig(addr, n)`](/0x29a-docs/globals/helpers.md#mksig-a-n), which generates and immediately validates the signature, printing the result.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://0x29a.gitbook.io/0x29a-docs/memory-and-analysis/sig.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.