token-budget-advisor

# Token Budget Advisor (TBA)

Intercept the response flow to offer the user a choice about response depth **before** Gemini answers.

## When to Use

- User wants to control how long or detailed a response is
- User mentions tokens, budget, depth, or response length
- User says "short version", "tldr", "brief", "al 25%", "exhaustive", etc.
- Any time the user wants to choose depth/detail level upfront

**Do not trigger** when: user already set a level this session (maintain it silently), or the answer is trivially one line.

## How It Works

### Step 1 — Estimate input tokens

Use the repository's canonical context-budget heuristics to estimate the prompt's token count mentally.

Use the same calibration guidance as [context-budget](../egc-context-budget/SKILL.md):

- prose: `words × 1.3`
- code-heavy or mixed/code blocks: `chars / 4`

For mixed content, use the dominant content type and keep the estimate heuristic.

### Step 2 — Estimate response size by complexity

Classify the prompt, then apply the multiplier range to get the full response window:

| Complexity   | Multiplier range | Example prompts                                      |
|--------------|------------------|------------------------------------------------------|
| Simple       | 3× – 8×          | "What is X?", yes/no, single fact                   |
| Medium       | 8× – 20×         | "How does X work?"                                  |
| Medium-High  | 10× – 25×        | Code request with context                           |
| Complex      | 15× – 40×        | Multi-part analysis, comparisons, architecture      |
| Creative     | 10× – 30×        | Stories, essays, narrative writing                  |

Response window = `input_tokens × mult_min` to `input_tokens × mult_max` (but don’t exceed your model’s configured output-token limit).

### Step 3 — Present depth options

Present this block **before** answering, using the actual estimated numbers:

```
Analyzing your prompt...

Input: ~[N] tokens  |  Type: [type]  |  Complexity: [level]  |  Language: [lang]

Choose your depth level:

[1] Essential   (25%)  ->  ~[tokens]   Direct answer only, no preamble
[2] Moderate    (50%)  ->  ~[tokens]   Answer + context + 1 example
[3] Detailed    (75%)  ->  ~[tokens]   Full answer with alternatives
[4] Exhaustive (100%)  ->  ~[tokens]   Everything, no limits

Which level? (1-4 or say "25% depth", "50% depth", "75% depth", "100% depth")

Precision: heuristic estimate ~85-90% accuracy (±15%).
```

Level token estimates (within the response window):
- 25%  → `min + (max - min) × 0.25`
- 50%  → `min + (max - min) × 0.50`
- 75%  → `min + (max - min) × 0.75`
- 100% → `max`

### Step 4 — Respond at the chosen level

| Level            | Target length       | Include                                             | Omit                                              |
|------------------|---------------------|-----------------------------------------------------|---------------------------------------------------|
| 25% Essential    | 2-4 sentences max   | Direct answer, key conclusion                       | Context, examples, nuance, alternatives           |
| 50% Moderate     | 1-3 paragraphs      | Answer + necessary context + 1 example              | Deep analysis, edge cases, references             |
| 75% Detailed     | Structured response | Multiple examples, pros/cons, alternatives          | Extreme edge cases, exhaustive references         |
| 100% Exhaustive  | No restriction      | Everything — full analysis, all code, all perspectives | Nothing                                        |

## Shortcuts — skip the question

If the user already signals a level, respond at that level immediately without asking:

| What they say                                      | Level |
|----------------------------------------------------|-------|
| "1" / "25% depth" / "short version" / "brief answer" / "tldr"  | 25%   |
| "2" / "50% depth" / "moderate depth" / "balanced answer"        | 50%   |
| "3" / "75% depth" / "detailed answer" / "thorough answer"       | 75%   |
| "4" / "100% depth" / "exhaustive answer" / "full deep dive"     | 100%  |

If the user set a level earlier in the session, **maintain it silently** for subsequent responses unless they change it.

## Precision note

This skill uses heuristic estimation — no real tokenizer. Accuracy ~85-90%, variance ±15%. Always show the disclaimer.

## Examples

### Triggers

- "Give me the short version first."
- "How many tokens will your answer use?"
- "Respond at 50% depth."
- "I want the exhaustive answer, not the summary."
- "Dame la version corta y luego la detallada."

### Does Not Trigger

- "What is a JWT token?"
- "The checkout flow uses a payment token."
- "Is this normal?"
- "Complete the refactor."
- Follow-up questions after the user already chose a depth for the session

## Source

Originally from [Token Budget Advisor](https://github.com/Xabilimon1/Token-Budget-Advisor-Claude-Code-), adapted for Gemini CLI.
Original project also ships a Python estimator script, but this repository keeps the skill self-contained and heuristic-only.