docs

docs/sequences.md

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+# Control and Escape Sequences
+
+This is the list of control and escape sequences known in the ecosystem
+of terminal emulators and their implementation status in ghostty. Note that
+some control sequences may never be implemented in ghostty. In these scenarios,
+it is noted why.
+
+| Seq | ASCII | Name | Status |
+|:---:|:-----:|:-----|:------:|
+| `ENQ` | `0x05` | [Enquiry](sequences/enq.md) | ✅ |

docs/sequences/enq.md

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+# Enquiry (Answerback)
+
+| Text |          |
+| Hex  | `0x05`   |
+
+Sends an answerback string. In the VT100, this was configurable by the
+operator.
+
+## Implementation Details
+
+  * ghostty always sends `""`
+
+## TODO
+
+  * Make the answerback configurable
+
+## References
+
+  * https://vt100.net/docs/vt100-ug/chapter3.html