diff --git a/Cargo.lock b/Cargo.lock
index 59fea94f..af276c8d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "addr2line"
-version = "0.21.0"
+version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
+checksum = "6e4503c46a5c0c7844e948c9a4d6acd9f50cccb4de1c48eb9e291ea17470c678"
 dependencies = [
  "gimli",
 ]
@@ -28,7 +28,7 @@ dependencies = [
 
 [[package]]
 name = "aichat"
-version = "0.17.0"
+version = "0.18.0"
 dependencies = [
  "ansi_colours",
  "anyhow",
@@ -159,9 +159,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.83"
+version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25bdb32cbbdce2b519a9cd7df3a678443100e265d5e25ca763b7572a5104f5f3"
+checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
 
 [[package]]
 name = "arboard"
@@ -201,6 +201,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "atomic-waker"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
+
 [[package]]
 name = "autocfg"
 version = "1.3.0"
@@ -220,9 +226,9 @@ dependencies = [
 
 [[package]]
 name = "aws-smithy-types"
-version = "1.1.9"
+version = "1.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf98d97bba6ddaba180f1b1147e202d8fe04940403a95a3f826c790f931bbd1"
+checksum = "5b6764ba7e1c5ede1c9f9e4046645534f06c2581402461c559b481a420330a83"
 dependencies = [
  "base64-simd",
  "bytes",
@@ -238,9 +244,9 @@ dependencies = [
 
 [[package]]
 name = "backtrace"
-version = "0.3.71"
+version = "0.3.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26b05800d2e817c8b3b4b54abd461726265fa9789ae34330622f2db9ee696f9d"
+checksum = "17c6a35df3749d2e8bb1b7b21a976d82b15548788d2735b9d82f329268f71a11"
 dependencies = [
  "addr2line",
  "cc",
@@ -323,9 +329,9 @@ dependencies = [
 
 [[package]]
 name = "block2"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43ff7d91d3c1d568065b06c899777d1e48dcf76103a672a0adbc238a7f247f1e"
+checksum = "2c132eebf10f5cad5289222520a4a058514204aed6d791f1cf4fe8088b82d15f"
 dependencies = [
  "objc2",
 ]
@@ -377,9 +383,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.97"
+version = "1.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "099a5357d84c4c61eb35fc8eafa9a79a902c2f76911e5747ced4e032edd8d9b4"
+checksum = "41c270e7540d725e65ac7f1b212ac8ce349719624d7bcff99f8e2e488e8cf03f"
 
 [[package]]
 name = "cfg-if"
@@ -490,9 +496,9 @@ dependencies = [
 
 [[package]]
 name = "crc32fast"
-version = "1.4.0"
+version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3855a8a784b474f333699ef2bbca9db2c4a1f6d9088a90a2d25b1eb53111eaa"
+checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
 dependencies = [
  "cfg-if",
 ]
@@ -625,9 +631,9 @@ checksum = "0d6ef0072f8a535281e4876be788938b528e9a1d43900b82c2569af7da799125"
 
 [[package]]
 name = "either"
-version = "1.11.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a47c1c47d2f5964e29c61246e81db715514cd532db6b5116a25ea3c03d6780a2"
+checksum = "3dca9240753cf90908d7e4aac30f630662b02aebaa1b58a3cadabdb23385b58b"
 
 [[package]]
 name = "equivalent"
@@ -873,21 +879,21 @@ dependencies = [
 
 [[package]]
 name = "gimli"
-version = "0.28.1"
+version = "0.29.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253"
+checksum = "40ecd4077b5ae9fd2e9e169b102c6c330d0605168eb0e8bf79952b256dbefffd"
 
 [[package]]
 name = "h2"
-version = "0.4.4"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "816ec7294445779408f36fe57bc5b7fc1cf59664059096c65f905c1c61f58069"
+checksum = "fa82e28a107a8cc405f0839610bdc9b15f1e25ec7d696aa5cf173edbcb1486ab"
 dependencies = [
+ "atomic-waker",
  "bytes",
  "fnv",
  "futures-core",
  "futures-sink",
- "futures-util",
  "http",
  "indexmap",
  "slab",
@@ -1024,9 +1030,9 @@ dependencies = [
 
 [[package]]
 name = "hyper-util"
-version = "0.1.3"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca38ef113da30126bbff9cd1705f9273e15d45498615d138b0c20279ac7a76aa"
+checksum = "7b875924a60b96e5d7b9ae7b066540b1dd1cbd90d1828f54c92e02a283351c56"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -1181,9 +1187,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.154"
+version = "0.2.155"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae743338b92ff9146ce83992f766a31066a91a8c84a45e0e9f21e7cf6de6d346"
+checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
 
 [[package]]
 name = "libloading"
@@ -1213,9 +1219,9 @@ checksum = "dd1bc4d24ad230d21fb898d1116b1801d7adfc449d42026475862ab48b11e70e"
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.4.13"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01cda141df6706de531b6c46c3a33ecca755538219bd484262fa09410c13539c"
+checksum = "78b3ae25bc7c8c38cec158d1f2757ee79e9b3740fbc7ccf0e59e4b08d793fa89"
 
 [[package]]
 name = "lock_api"
@@ -1288,9 +1294,9 @@ checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.7.2"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d811f3e15f28568be3407c8e7fdb6514c1cda3cb30683f15b6a1a1dc4ea14a7"
+checksum = "87dfd01fe195c66b572b37921ad8803d010623c0aca821bea2302239d155cdae"
 dependencies = [
  "adler",
 ]
@@ -1402,15 +1408,15 @@ dependencies = [
 
 [[package]]
 name = "objc-sys"
-version = "0.3.3"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da284c198fb9b7b0603f8635185e85fbd5b64ee154b1ed406d489077de2d6d60"
+checksum = "cdb91bdd390c7ce1a8607f35f3ca7151b65afc0ff5ff3b34fa350f7d7c7e4310"
 
 [[package]]
 name = "objc2"
-version = "0.5.1"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4b25e1034d0e636cd84707ccdaa9f81243d399196b8a773946dcffec0401659"
+checksum = "46a785d4eeff09c14c487497c162e92766fbb3e4059a71840cecc03d9a50b804"
 dependencies = [
  "objc-sys",
  "objc2-encode",
@@ -1418,48 +1424,92 @@ dependencies = [
 
 [[package]]
 name = "objc2-app-kit"
-version = "0.2.0"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb79768a710a9a1798848179edb186d1af7e8a8679f369e4b8d201dd2a034047"
+checksum = "e4e89ad9e3d7d297152b17d39ed92cd50ca8063a89a9fa569046d41568891eff"
 dependencies = [
+ "bitflags 2.5.0",
  "block2",
+ "libc",
  "objc2",
  "objc2-core-data",
+ "objc2-core-image",
  "objc2-foundation",
+ "objc2-quartz-core",
 ]
 
 [[package]]
 name = "objc2-core-data"
-version = "0.2.0"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e092bc42eaf30a08844e6a076938c60751225ec81431ab89f5d1ccd9f958d6c"
+checksum = "617fbf49e071c178c0b24c080767db52958f716d9eabdf0890523aeae54773ef"
 dependencies = [
+ "bitflags 2.5.0",
  "block2",
  "objc2",
  "objc2-foundation",
 ]
 
+[[package]]
+name = "objc2-core-image"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55260963a527c99f1819c4f8e3b47fe04f9650694ef348ffd2227e8196d34c80"
+dependencies = [
+ "block2",
+ "objc2",
+ "objc2-foundation",
+ "objc2-metal",
+]
+
 [[package]]
 name = "objc2-encode"
-version = "4.0.1"
+version = "4.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88658da63e4cc2c8adb1262902cd6af51094df0488b760d6fd27194269c0950a"
+checksum = "7891e71393cd1f227313c9379a26a584ff3d7e6e7159e988851f0934c993f0f8"
 
 [[package]]
 name = "objc2-foundation"
-version = "0.2.0"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ee638a5da3799329310ad4cfa62fbf045d5f56e3ef5ba4149e7452dcf89d5a8"
+dependencies = [
+ "bitflags 2.5.0",
+ "block2",
+ "libc",
+ "objc2",
+]
+
+[[package]]
+name = "objc2-metal"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd0cba1276f6023976a406a14ffa85e1fdd19df6b0f737b063b95f6c8c7aadd6"
+dependencies = [
+ "bitflags 2.5.0",
+ "block2",
+ "objc2",
+ "objc2-foundation",
+]
+
+[[package]]
+name = "objc2-quartz-core"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cfaefe14254871ea16c7d88968c0ff14ba554712a20d76421eec52f0a7fb8904"
+checksum = "e42bee7bff906b14b167da2bac5efe6b6a07e6f7c0a21a7308d40c960242dc7a"
 dependencies = [
+ "bitflags 2.5.0",
  "block2",
  "objc2",
+ "objc2-foundation",
+ "objc2-metal",
 ]
 
 [[package]]
 name = "object"
-version = "0.32.2"
+version = "0.35.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6a622008b6e321afc04970976f62ee297fdbaa6f95318ca343e3eebb9648441"
+checksum = "b8ec7ab813848ba4522158d5517a6093db1ded27575b070f4177b8d12b41db5e"
 dependencies = [
  "memchr",
 ]
@@ -1528,9 +1578,9 @@ checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
 
 [[package]]
 name = "parking_lot"
-version = "0.12.2"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e4af0ca4f6caed20e900d564c242b8e5d4903fdacf31d3daf527b66fe6f42fb"
+checksum = "f1bf18183cf54e8d6059647fc3063646a1801cf30896933ec2311622cc4b9a27"
 dependencies = [
  "lock_api",
  "parking_lot_core",
@@ -1631,9 +1681,9 @@ checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.82"
+version = "1.0.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ad3d49ab951a01fbaafe34f2ec74122942fe18a3f9814c3268f1bb72042131b"
+checksum = "ec96c6a92621310b51366f1e28d05ef11489516e93be030060e5fc12024a49d6"
 dependencies = [
  "unicode-ident",
 ]
@@ -1926,9 +1976,9 @@ checksum = "976295e77ce332211c0d24d92c0e83e50f5c5f046d11082cea19f3df13a3562d"
 
 [[package]]
 name = "rustls-webpki"
-version = "0.102.3"
+version = "0.102.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3bce581c0dd41bce533ce695a1437fa16a7ab5ac3ccfa99fe1a620a7885eabf"
+checksum = "ff448f7e92e913c4b7d4c6d8e4540a1724b319b4152b8aef6d4cf8339712b33e"
 dependencies = [
  "ring",
  "rustls-pki-types",
@@ -1937,9 +1987,9 @@ dependencies = [
 
 [[package]]
 name = "rustversion"
-version = "1.0.16"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "092474d1a01ea8278f69e6a358998405fae5b8b963ddaeb2b0b04a128bf1dfb0"
+checksum = "955d28af4278de8121b7ebeb796b6a45735dc01436d898801014aced2773a3d6"
 
 [[package]]
 name = "ryu"
@@ -2002,18 +2052,18 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.201"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "780f1cebed1629e4753a1a38a3c72d30b97ec044f0aef68cb26650a3c5cf363c"
+checksum = "7253ab4de971e72fb7be983802300c30b5a7f0c2e56fab8abfc6a214307c0094"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.201"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c5e405930b9796f1c00bee880d03fc7e0bb4b9a11afc776885ffe84320da2865"
+checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2203,9 +2253,9 @@ checksum = "81cdd64d312baedb58e21336b31bc043b77e01cc99033ce76ef539f78e965ebc"
 
 [[package]]
 name = "syn"
-version = "2.0.63"
+version = "2.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf5be731623ca1a1fb7d8be6f261a3be6d3e2337b8a1f97be944d020c8fcb704"
+checksum = "c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2273,18 +2323,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.60"
+version = "1.0.61"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "579e9083ca58dd9dcf91a9923bb9054071b9ebbd800b342194c9feb0ee89fc18"
+checksum = "c546c80d6be4bc6a00c0f01730c08df82eaa7a7a61f11d656526506112cc1709"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.60"
+version = "1.0.61"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2470041c06ec3ac1ab38d0356a6119054dedaea53e12fbefc0de730a1c08524"
+checksum = "46c3384250002a6d5af4d114f2845d37b57521033f30d5c3f46c4d70e1197533"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2461,7 +2511,6 @@ dependencies = [
  "tokio",
  "tower-layer",
  "tower-service",
- "tracing",
 ]
 
 [[package]]
@@ -2482,7 +2531,6 @@ version = "0.1.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3523ab5a71916ccf420eebdf5521fcef02141234bbc0b8a49f2fdc4544364ef"
 dependencies = [
- "log",
  "pin-project-lite",
  "tracing-attributes",
  "tracing-core",
@@ -2540,9 +2588,9 @@ dependencies = [
 
 [[package]]
 name = "tree_magic_mini"
-version = "3.1.4"
+version = "3.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77ee137597cdb361b55a4746983e4ac1b35ab6024396a419944ad473bb915265"
+checksum = "469a727cac55b41448315cc10427c069c618ac59bb6a4480283fcd811749bdc2"
 dependencies = [
  "fnv",
  "home",
@@ -3138,6 +3186,6 @@ checksum = "ec107c4503ea0b4a98ef47356329af139c0a4f7750e621cf2973cd3385ebcb3d"
 
 [[package]]
 name = "zeroize"
-version = "1.7.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
diff --git a/Cargo.toml b/Cargo.toml
index d55d81cd..fa4c6679 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,9 +1,9 @@
 [package]
 name = "aichat"
-version = "0.17.0"
+version = "0.18.0"
 edition = "2021"
 authors = ["sigoden <sigoden@gmail.com>"]
-description = "All-in-one AI-Powered CLI Chat & Copilot"
+description = "All-in-one AI CLI Tool"
 license = "MIT OR Apache-2.0"
 homepage = "https://github.com/sigoden/aichat"
 repository = "https://github.com/sigoden/aichat"
diff --git a/README.md b/README.md
index a4218916..bdf37d10 100644
--- a/README.md
+++ b/README.md
@@ -1,41 +1,40 @@
-# Aichat: All-in-one AI-Powered CLI Chat & Copilot
+# AIChat: All-in-one AI CLI Tool
 
 [![CI](https://github.com/sigoden/aichat/actions/workflows/ci.yaml/badge.svg)](https://github.com/sigoden/aichat/actions/workflows/ci.yaml)
 [![Crates](https://img.shields.io/crates/v/aichat.svg)](https://crates.io/crates/aichat)
 [![Discord](https://img.shields.io/discord/1226737085453701222?label=Discord)](https://discord.gg/mr3ZZUB9hG)
 
-AIChat is a cutting-edge CLI chat and copilot tool that seamlessly integrates with over 10 leading AI platforms, providing a powerful combination of chat-based interaction, context-aware conversations, and AI-assisted shell capabilities, all within a customizable and user-friendly environment.
+AIChat is an all-in-one AI CLI tool that allows users to access over 100 LLMs across 20+ AI platforms, with features including a chat REPL, custom roles, unlimited sessions, function calling, and more.
 
 ![AIChat Command](https://github.com/sigoden/aichat/assets/4012553/84ae8382-62be-41d0-a0f1-101b113c5bc7)
 
 ![AIChat Chat-REPL](https://github.com/sigoden/aichat/assets/4012553/13470451-9502-4b3e-b49a-e66aa7760208)
 
-## Key Features
+## Features
 
-- Integrate with 20+ AI platforms
-- Support [Chat-REPL](#chat-repl)
-- Support [Roles](#defining-roles)
-- Support sessions (context-aware conversation)
-- Support image analysis (vision)
-- [Shell commands](#shell-commands): Execute commands using natural language
-- [Shell integration](#shell-integration): AI-based shell auto-completion
-- Support extensive configuration and theme customization
-- Support stream/non-stream
-- Provide access to all LLMs using OpenAI format API
-- Host LLM playground/arena web applications
+- **Unified CLI**: Access 100+ LLMs across 20+ AI platforms effortlessly.
+- **Chat-REPL**: Powerful and feature-rich interactive chat interface.
+- **Custom Roles**: Tailor LLM behavior with customizable roles.
+- **Unlimited Sessions**: Automatic message compression for endless conversations.
+- **Function Calling**: Connect LLMs to external tools seamlessly.
+- **Execute Commands**: Use natural language to run shell commands.
+- **Shell Auto-Completion**: AI-based auto-completion for shell commands.
+- **Highly Customizable**: Customize configurations and themes to your preferences.
+- **Local API Server**: Host a local server with OpenAI-compatible API.
+- **LLM Playground/Arena**: Experiment and compete LLMs in WebUI.
 
 ## Supported AI Platforms
 
-- OpenAI GPT-3.5/GPT-4 (paid, vision)
-- Gemini: Gemini-1.0/Gemini-1.5 (free, paid, vision)
-- Claude: Claude-3 (vision, paid)
-- Mistral (paid)
-- Cohere: Command-R/Command-R+ (paid)
+- OpenAI GPT-3.5/GPT-4 (paid, vision, function-calling)
+- Gemini: Gemini-1.0/Gemini-1.5 (free, paid, vision, function-calling)
+- Claude: Claude-3 (vision, paid, function-calling)
+- Mistral (paid, function-calling)
+- Cohere: Command-R/Command-R+ (paid, function-calling)
 - Perplexity: Llama-3/Mixtral (paid)
 - Groq: Llama-3/Mixtral/Gemma (free)
 - Ollama (free, local)
 - Azure OpenAI (paid)
-- VertexAI: Gemini-1.0/Gemini-1.5 (paid, vision)
+- VertexAI: Gemini-1.0/Gemini-1.5 (paid, vision, function-calling)
 - VertexAI-Claude: Claude-3 (paid, vision)
 - Bedrock: Llama-3/Claude-3/Mistral (paid, vision)
 - Cloudflare (free, paid, vision)
@@ -63,13 +62,13 @@ Download pre-built binaries for macOS, Linux, and Windows from [GitHub Releases]
 
 ## Configuration
 
-Upon first launch, AIChat will guide you through the configuration process. An example configuration file is provided below:
+Upon first launch, AIChat will guide you through the configuration process.
 
 ```
 > No config file, create a new one? Yes
 > AI Platform: openai
 > API Key: <your_api_key_here>
-✨ Saved config file to <user-config-dir>/aichat/config.yaml
+✨ Saved config file to <config-dir>/aichat/config.yaml
 ```
 
 Feel free to adjust the configuration according to your needs.
@@ -95,7 +94,10 @@ prelude: null                    # Set a default role or session to start with (
 buffer_editor: null
 
 # Compress session when token count reaches or exceeds this threshold (must be at least 1000)
-compress_threshold: 1000
+compress_threshold: 4000
+
+# Controls the function calling feature. For setup instructions, visit https://github.com/sigoden/llm-functions.
+function_calling: false
 
 clients:
   - type: openai
@@ -111,9 +113,10 @@ clients:
   ...
 ```
 
-Refer to the [config.example.yaml](config.example.yaml) file for a complete list of configuration options.
+The [config.example.yaml](./config.example.yaml) file provides a comprehensive list of all configuration options with detailed explanations.
+You'll find information on each option's meaning, default value, relevant documentation, and customization guidance.
 
-## Command line
+## Command-Line
 
 ```
 Usage: aichat [OPTIONS] [TEXT]...
@@ -246,31 +249,9 @@ Press Ctrl+C to cancel the response, Ctrl+D to exit the REPL
 
 ### `.info` - view information
 
-```
-> .info
-model               openai:gpt-3.5-turbo
-max_output_tokens   4096 (current model)
-temperature         -
-top_p               -
-dry_run             false
-save                true
-save_session        -
-highlight           true
-light_theme         false
-wrap                no
-wrap_code           false
-auto_copy           true
-keybindings         emacs
-prelude             -
-compress_threshold  2000
-config_file         /home/alice/.config/aichat/config.yaml
-roles_file          /home/alice/.config/aichat/roles.yaml
-messages_file       /home/alice/.config/aichat/messages.md
-sessions_dir        /home/alice/.config/aichat/sessions
-```
-
-> 💡 Run `.info role` to view your current role information.
-> 💡 Run `.info session` to view your current session information.
+- `.info`: View system information
+- `.info role`: view your current role information.
+- `.info session`: view your current session information.
 
 ### `.model` - change the current LLM
 
@@ -353,7 +334,7 @@ Usage: .file <file>... [-- text...]
 
 .file message.txt
 .file config.yaml -- convert to toml
-.file a.jpg b.jpg -- What’s in these images?
+.file screentshot.png -- design a web app based on the image
 .file https://ibb.co/a.png https://ibb.co/b.png -- what is the difference?
 ```
 
@@ -400,36 +381,23 @@ curl -X POST -H "Content-Type: application/json" -d '{
 
 The LLM Playground is a webapp that allows you to interact with any LLM supported by AIChat directly in your browser.
 
-![image](https://github.com/sigoden/aichat/assets/4012553/68043aa3-5778-4688-9c2f-3d96aa600b7a)
+![image](https://github.com/sigoden/aichat/assets/4012553/d2334c03-9a07-41a4-a326-e4ee37477ce3)
 
 ### LLM Arena
 
 The LLM Arena is a web-based platform where you can compare different LLMs side-by-side. 
 
-![image](https://github.com/sigoden/aichat/assets/4012553/dc6dbf5a-488f-4bf4-a710-f1f9fc76933b)
-
-## Defining Roles
+![image](https://github.com/sigoden/aichat/assets/4012553/7883a708-aa8d-417b-a82d-9b58cc73d91b)
 
-The `roles.yaml` file allows you to define a variety of roles, each with its own unique prompt and behavior. This enables the LLM to adapt to specific tasks and provide tailored responses.
+## Function Calling
 
-We can define a role like this:
+Function calling supercharges LLMs by connecting them to external tools and data sources. This unlocks a world of possibilities, enabling LLMs to go beyond their core capabilities and tackle a wider range of tasks.
 
-```yaml
-- name: emoji
-  prompt: >
-    I want you to translate the sentences I write into emojis.
-    I will write the sentence, and you will express it with emojis.
-    I don't want you to reply with anything but emoji.
-```
+We have created a new repository to help you make the most of this feature: [https://github.com/sigoden/llm-functions](https://github.com/sigoden/llm-functions)
 
-This enables the LLM to respond as a Linux shell expert.
+Here's a glimpse of what function calling can do for you:
 
-```
-> .role emoji
-
-emoji> fire
-🔥
-```
+![image](https://github.com/sigoden/aichat/assets/4012553/c1b6b136-bbd3-4028-9b01-7d728390c0bf)
 
 ## Wikis
 
diff --git a/config.example.yaml b/config.example.yaml
index 73620417..b6ec6fec 100644
--- a/config.example.yaml
+++ b/config.example.yaml
@@ -37,6 +37,7 @@ clients:
   #     - name: xxxx                                  # The model name
   #       max_input_tokens: 100000
   #       supports_vision: true
+  #       supports_function_calling: true
   #   patches: 
   #     <regex>:                                      # The regex to match model names, e.g. '.*' 'gpt-4o' 'gpt-4o|gpt-4-.*'
   #       request_body:                               # The JSON to be merged with the request body.