Observed arrival · 2026-09-19
piighost Keeps PII Away from the Model
A Python library that replaces personally identifiable information with stable placeholders before prompts reach an LLM, then restores the original values for tools and users.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Developers building agents with sensitive user data
- Worth noticing
- It preserves stable placeholders across messages, tool calls, and an entire conversation.
Field notes
The project describes a configurable pipeline rather than a single detector: regex, named-entity recognition, and LLM detectors can be combined, with long documents split into chunks for coverage. Its central state-management detail is placeholder stability across a conversation, including tool calls, so an agent can continue reasoning about the same person or object without exposing the source value to the model.
Observed signals
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○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
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