This study examines the dual discursive articulation in the Instagram posts of the street library community, Literasi Trotoar (LIAR), in Purwakarta, Indonesia. The study focuses on two groups of posts: those directed towards the LIAR community and the general public, and those aimed at the Indonesian government. To analyse the posts, this study adopts 'Multimodal Critical Discourse Analysis (MCDA)'. The findings reveal the presence of two integrated and inseparable types of articulation within the posts. Firstly, articulation serves as a discursive tool to persuade the public to embrace in-group ideology through positive in-group representation, subject interpellation, ideological legitimation, and power formation. Secondly, articulation functions as a discursive mechanism to challenge the authority of the government negative out-group representation, subject resistance, ideological delegitimization, and power exertion. This study proposes a model termed 'dual discursive articulation,' which integrates two discursive objectives: persuasion and resistance.

Keywords: Social movement, street library, multimodal critical discourse analysis, articulation, resistance, persuasion, power relation, ideology, legitimation